Canadian authorities say the man accused of barreling his sport-utility vehicle through a Filipino heritage festival crowd in Vancouver over the weekend had been under the care of a mental health team before the attack.

A 30-year-old Vancouver man was arrested at the scene and the department’s Major Crime Section is overseeing the investigation, police said.

30-year-old Kai-Ji Adam Lo was charged with eight counts of second-degree murder in a Vancouver courtroom on Sunday, April 27 in relation to an attack that took place on April 26, which left at least 11 dead.