Terror threat cancels Rotterdam concert

(CNN)A terror threat early Wednesday in the Netherlands caused the cancellation of a concert at a venue in Rotterdam, police there said.

Later that night, authorities stopped a van with Spanish plates that was carrying gas cylinders inside an area cordoned off by police near Rotterdam Maassilo, the concert venue, Mayor Ahmed Aboutaleb told reporters.

Authorities did not have to evacuate Maassilo because the concert hadn't started, Rotterdam Police press officer Roland Ekkers said. The American rock band Allah-Las was scheduled to perform, the band's website said.

Police did not offer details on the threat. Ekkers said it was too soon to say if the van was directly connected.

"It can also be someone who was going to a camping site, but with the threat that we have, and what we found in the van, we decided to investigate," he said.

Rotterdam Police respond to a terror threat on Wednesday.

Rotterdam Police respond to a terror threat on Wednesday.

Ekkers said the van, which police stopped around 9:30 p.m., was "driven by a Spaniard." Authorities found "about five" gas bottles in the vehicle.

Ekkers said the driver "has been taken into custody because we want to ask him about gas bottles."

Bomb experts are looking at the van, police said.

The threat comes as two suspects allegedly connected to the terror cell behind recent attacks in Spain were formally charged Tuesday amid reports the cell was planning to target Barcelona landmarks.

 

 

 

BARCELONA, SPAIN - AUGUST 17:  A damaged van, believed to be the one used in the attack, is surrounded by forensics officers in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 50 injured after a van plowed into people in the Las Ramblas area of the city.  (Photo by David Ramos/Getty Images)

Witness describes 'immediate carnage' in Spain

Barcelona van attack graphic video_00011110.jpg

Video shows bodies on ground after van attack

Victims on ground after terror attack

Barcelona car attack

Police: Van plowed into crowd in Barcelona

A person is stretched out of a mall by medical staff members in a cordoned off area after a van ploughed into the crowd, injuring several persons on the Rambla in Barcelona on August 17, 2017.
Police in Barcelona said they were dealing with a "terrorist attack" after a vehicle ploughed into a crowd of pedestrians on the city's famous Las Ramblas boulevard on August 17, 2017. Police were clearing the area after the incident, which has left a number of people injured. / AFP PHOTO / Josep LAGO        (Photo credit should read JOSEP LAGO/AFP/Getty Images)

Witness: Barcelona scene extremely distressing

Injured people are treated in Barcelona, Spain, Thursday, Aug. 17, 2017 after a white van jumped the sidewalk in the historic Las Ramblas district, crashing into a summer crowd of residents and tourists and injuring several people, police said. (AP Photo/Oriol Duran)

Vehicles as weapons: A disturbing trend

psychology of terror sanjay gupta nws orig_00002811.jpg

The psychology of terror

A policemen stand as he blocks the street to a cordoned off area after a van ploughed into the crowd, injuring several persons on the Rambla in Barcelona on August 17, 2017. / AFP PHOTO / PAU BARRENA        (Photo credit should read PAU BARRENA/AFP/Getty Images)

Witness: People were screaming in terror

barcelona spain attacks fugitive suspect named soares_00011127

Police identify suspect in Spain attacks

People stand next to flowers, candles and other items set up on the Las Ramblas boulevard in Barcelona as they pay tribute to the victims of the Barcelona attack, a day after a van ploughed into the crowd, killing 13 persons and injuring over 100 on August 18, 2017. 
Police hunted for the driver who rammed a van into pedestrians on an avenue crowded with tourists in Barcelona, leaving 13 people dead and  more than 100 injured, just hours before a second assault in a resort along the coast. / AFP PHOTO / PASCAL GUYOT        (Photo credit should read PASCAL GUYOT/AFP/Getty Images)

Barcelona attack: Flowers, candles and tears

A woman gestures as she is escorted out by Spanish policemen outside a cordoned off area after a van ploughed into the crowd, killing 13 persons and injuring over 80 on the Rambla in Barcelona on August 17, 2017.

Timeline of attacks in Spain

A person is helped by Spanish policemen and two men after a van ploughed into the crowd, killing at least 13 people and injuring around 100 others on the Rambla in Barcelona on August 17, 2017.
A driver deliberately rammed a van into a crowd on Barcelona's most popular street on August 17, 2017 killing at least 13 people before fleeing to a nearby bar, police said. 
Officers in Spain's second-largest city said the ramming on Las Ramblas was a "terrorist attack". The driver of a van that mowed into a packed street in Barcelona is still on the run, Spanish police said. / AFP PHOTO / Nicolas CARVALHO OCHOA        (Photo credit should read NICOLAS CARVALHO OCHOA/AFP/Getty Images)

Witnesses describe Barcelona attack

Pence: Images of Barcelona attack sicken us

BARCELONA, SPAIN - AUGUST 17:  A damaged van, believed to be the one used in the attack, is surrounded by forensics officers in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 50 injured after a van plowed into people in the Las Ramblas area of the city.  (Photo by David Ramos/Getty Images)

Witness describes 'immediate carnage' in Spain

Barcelona van attack graphic video_00011110.jpg

Video shows bodies on ground after van attack

Victims on ground after terror attack

Barcelona car attack

Police: Van plowed into crowd in Barcelona

A person is stretched out of a mall by medical staff members in a cordoned off area after a van ploughed into the crowd, injuring several persons on the Rambla in Barcelona on August 17, 2017.
Police in Barcelona said they were dealing with a "terrorist attack" after a vehicle ploughed into a crowd of pedestrians on the city's famous Las Ramblas boulevard on August 17, 2017. Police were clearing the area after the incident, which has left a number of people injured. / AFP PHOTO / Josep LAGO        (Photo credit should read JOSEP LAGO/AFP/Getty Images)

Witness: Barcelona scene extremely distressing

Injured people are treated in Barcelona, Spain, Thursday, Aug. 17, 2017 after a white van jumped the sidewalk in the historic Las Ramblas district, crashing into a summer crowd of residents and tourists and injuring several people, police said. (AP Photo/Oriol Duran)

Vehicles as weapons: A disturbing trend

psychology of terror sanjay gupta nws orig_00002811.jpg

The psychology of terror

A policemen stand as he blocks the street to a cordoned off area after a van ploughed into the crowd, injuring several persons on the Rambla in Barcelona on August 17, 2017. / AFP PHOTO / PAU BARRENA        (Photo credit should read PAU BARRENA/AFP/Getty Images)

Witness: People were screaming in terror

barcelona spain attacks fugitive suspect named soares_00011127

Police identify suspect in Spain attacks

People stand next to flowers, candles and other items set up on the Las Ramblas boulevard in Barcelona as they pay tribute to the victims of the Barcelona attack, a day after a van ploughed into the crowd, killing 13 persons and injuring over 100 on August 18, 2017. 
Police hunted for the driver who rammed a van into pedestrians on an avenue crowded with tourists in Barcelona, leaving 13 people dead and  more than 100 injured, just hours before a second assault in a resort along the coast. / AFP PHOTO / PASCAL GUYOT        (Photo credit should read PASCAL GUYOT/AFP/Getty Images)

Barcelona attack: Flowers, candles and tears

A woman gestures as she is escorted out by Spanish policemen outside a cordoned off area after a van ploughed into the crowd, killing 13 persons and injuring over 80 on the Rambla in Barcelona on August 17, 2017.

Timeline of attacks in Spain

A person is helped by Spanish policemen and two men after a van ploughed into the crowd, killing at least 13 people and injuring around 100 others on the Rambla in Barcelona on August 17, 2017.
A driver deliberately rammed a van into a crowd on Barcelona's most popular street on August 17, 2017 killing at least 13 people before fleeing to a nearby bar, police said. 
Officers in Spain's second-largest city said the ramming on Las Ramblas was a "terrorist attack". The driver of a van that mowed into a packed street in Barcelona is still on the run, Spanish police said. / AFP PHOTO / Nicolas CARVALHO OCHOA        (Photo credit should read NICOLAS CARVALHO OCHOA/AFP/Getty Images)

Witnesses describe Barcelona attack

Pence: Images of Barcelona attack sicken us

BARCELONA, SPAIN - AUGUST 17:  A damaged van, believed to be the one used in the attack, is surrounded by forensics officers in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 50 injured after a van plowed into people in the Las Ramblas area of the city.  (Photo by David Ramos/Getty Images)

Witness describes 'immediate carnage' in Spain

Unity and defiance at memorial mass for Barcelona victims

Unity and defiance at memorial mass for Barcelona victims

One woman was killed when a car mowed down pedestrians early Friday in Cambrils, Spain. The five assailants were fatally shot by police on the scene.

The Cambrils attack happened hours after a van plowed through crowds Thursday on the renowned Las Ramblas avenue, a popular tourist section of Barcelona, killing 13 people and injuring more than 100 others.

READ MORE: Witness saw people 'flying into the air'

On Monday, Spanish authorities shot and killed Younes Abouyaaqoub, the suspected driver of the van, after a dayslong search in Subirats, west of Barcelona.

CNN's Milena Veselinovic and Mick Krever reported from London. CNN's Darran Simon contributed to this report.

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