UPDATE: Allah-Las have issued a statement regarding the cancelled show:

Due to a potential terror threat at The Maassilo in Rotterdam, the Allah-Las show was cancelled tonight.

Details are not available at this time as the incident is still under investigation. The band is unharmed and are very grateful to the Rotterdam Police and other responsible agencies for detecting the potential threat before anyone was hurt.

We are unable to comment any further at this time.

The Associated Press also reports that a suspicious van was stopped near the venue:

Previously:
California band Allah-Las were due to play Maassilo, a club in Rotterdam, Netherlands, tonight (8/23) but the show has been canceled due to a terror threat. From the club's Twitter:

According to The Daily Star, a Police anti-terror units arrived on the scene of the club which has a capacity of about 1000 and it was evacuated before the concert started.

The paper and other UK tabloids have pointed out that the band had a show in Turkey canceled due to religious references in the band's name. The Allah-Las spoke to this subject in a 2016 Guardian interview:

They chose to use Allah – Arabic for god – because they wanted something “holy sounding”. But they say they never realised some might interpret it as trivialising or mocking their religious beliefs. “We get emails from Muslims, here in the US and around the world, saying they’re offended, but that absolutely wasn’t our intention,” says Michaud. “We email back and explain why we chose the name and mainly they understand.”

In Turkey, a show got pulled because the promoter didn’t feel comfortable. “But what’s the alternative?” asks Siadatian. “We’ve had the name so long I don’t think we can change it. That wouldn’t work. We don’t dwell. You know, no regrets.”

The band have not made a statement about the canceled show. The story is developing.