Three men were arrested following an attack on Davis (CA) police officers who encountered a group of people blocking traffic on a busy roadway during Saturday’s Picnic Day at the University of California at Davis.

The incident occurred abut 3:30 p.m. Saturday, when three Davis police officers traveling on Russell Boulevard in an unmarked police vehicle encountered a large group of people in the roadway, blocking traffic, according to a Police Department news release.

A hostile group quickly surrounded the vehicle. As the officers got out of the car and began to identify themselves as police, two officers were attacked by several people and beaten on the ground. Police reported that the officers were kicked and punched in the head, and one officer was struck on the side of the head with a bottle.

The officers fought back and called for help. Two of the officers were taken to the emergency room for treatment. One suffered injuries to his eye and face, and the other was treated for a bleeding head wound caused by a bottle, the news release said.

Arrested were Alexander Reide Craver, 22, and Elijah James Williams, 19, both of West Sacramento, and Antwoine Rashadek Perry, 21, of Elk Grove. All were booked into Yolo County jail, the Sacramento Bee reports.