Denver Police Chief Paul Pazen said at a press conference Sunday that a person drove a car into police officers and an innocent bystander late Saturday night, sending three officers and the bystander to the hospital.

Two officers have already been released from the hospital and the third is also expected to recover. Mayor Michael Hancock said he’d been in contact with the officers and hoped for a speedy recovery for the bystander, but neither Hancock nor Pazen elaborated on the status of the bystander.

“We located the suspect vehicle and this is an active investigation that we certainly will follow through on,” Pazen said.

Pazen said that police made more than 80 arrests last night, mainly for curfew violation, but also for assault, destruction of property, criminal mischief and felony weapons violations.

Denver Health reported that 45 people needed medical attention during the protest on Saturday night.