And the band were escorted out of the back entrance with a heavy police escort.
Still, Szumiata said that uniformed and plainclothes police will be deployed to the concert site and around it in order to "ensure security of people taking part in the concert and those who will find themselves in the area".
Spanish authorities had shared "specific" information on the threat with Rotterdam police, he said. "The inhabitant of 22-year-old has been arrested", reported the police. According to the mayor, the threat was serious enough to cancel the event. His identity was not released, in line with Dutch privacy guidelines.
The statement loosely translates to: In connection with a terrorist threat, the Allah-Las concert has been stopped by the police tonight!
Rotterdam police said they took the information about a threat "seriously enough that after discussion with organizers it was made a decision to cancel the event".
Concert evacuated as Dutch police find van containing gas canisters
After receiving the information, the police in Holland chose to cancel an America rock band's concert that was to take place in the city. He was later freed, but the incident is still under investigation. Spanish authorities said that van is not connected to the vehicle attacks that killed 15 people in Barcelona and Cambrils last week.
A van containing gas canisters were found and its Spanish driver arrested. The man was described by the media as drunk.
Police spokesman Roland Ekkers told The Guardian it is "not likely" that the suspect is a terror threat.
The city's mayor, Ahmed Aboutaleb, said gas bottles were found in a small van with Spanish number plates found near the venue, where American rock group Allah-Las were due to perform.
The concert, by the United States band the Allah-Las, was called off after Dutch police received a terror alert from Spanish officers. The driver was detained and question.