Eleven people are now confirmed dead after an SUV barreled through a Filipino street festival in Vancouver Saturday evening, in what Vancouver Police Department Interim Chief Steve Rai has called “the darkest day in our city’s history.”

“We believe dozens more are injured, some seriously, and the number of dead could rise in the coming days or weeks,” Mr. Rai said at media at a press conference in Vancouver on Sunday morning.

He said the 30-year-old driver has “a significant history of interactions with police and healthcare professionals related to mental health.”

He said the man is not yet being identified, as charges have not been laid. He is currently in police custody.

“It is impossible to overstate how many lives have been impacted forever by this lone individual. There are many unanswered questions about this horrific crime, the motive of the person who did it, and whether anything could have been done to prevent it,” Mr. Rai said.