A van plowed into a crowd at Berlin’s biggest LGBTQ+ event late on Saturday, killing one person and wounding 16, with a police manhunt now underway for the suspected attacker.

Police said the van drove into people walking in the Tiergarten park in the center of the German capital, next to where thousands had gathered to celebrate the Pride event.

The suspect was known to police “as a member of Islamic circles” in Berlin, the Associated Press reported, citing a police spokesman, who did not specify the nature of those Islamic circles. CNN has reached out to Berlin police to ask if the attack is being treated as an act of terrorism.

Witnesses described hearing “a dull bang” as chaos erupted at Tiergarten, next to the route that the Pride march had passed along earlier.

Police said a van drove through the park shortly before 10 p.m. and hit several people. It was later found crashed into a tree and abandoned.