At least 10 people were shot, 4 fatally, at a backyard football watch party in California

FRESNO, Calif. (WGN) -- A group of family and friends were gathered in a backyard Sunday to watch a football game when a gunman walked up and began shooting, killing four people and wounding six others, according to authorities in Fresno, California.

About 35 to 40 people were at the house, including several children, when the suspect — who remains on the loose — started shooting into the crowd, according to police.

First-responders arrived at the home around 8 p.m. after receiving multiple 911 calls and found “three people down” and several suffering gunshot wounds, Fresno Police Deputy Chief Michael Reid told reporters. Officers immediately began performing CPR.

There was no immediate indication the suspect knew the victims, according to Reid.

The four men who died were between the ages of 25 and 30, according to Reid. Three of them were pronounced dead at the scene. The other was transported to Community Regional Medical Center where he died of his injuries.