Police in Boulder, Colo., said Sunday that several people were injured and a suspect is in custody following reports that someone was setting people on fire at an outdoor mall.

Although the FBI immediately described the incident as an act of terror, Boulder police Chief Steve Redfearn said it was too early to discuss a motive, but that witnesses were being interviewed.

"It would be irresponsible for me to speculate on motive this early on," he said.

The attack took place at a pedestrian mall where demonstrators had gathered to call for the release of hostages who remain in Gaza.

"Our agents and local law enforcement are on the scene already, and we will share updates as more information becomes available," FBI Director Kash Patel posted on social media.

Boulder police said there were

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