At least 10 people were shot Sunday at a party in Fresno in what appears to be a "mass casualty shooting," police say. The shooting took place about 6pm on the city’s southeast side, Fresno police Lt. Bill Dooley says. There was a "family and friend gathering" in the backyard of a home to watch a football game when the shooting suspects sneaked in and fired into the crowd, Dooley says. At least four people were killed and six others wounded, he tells the Fresno Bee. It was the second fatal gun attack Sunday in southeast Fresno. A man in his 20s was shot to death early Sunday at a home in another part of the city. Police have not said whether the incidents could be connected, the AP reports. No suspects are in custody. (More Fresno, California stories.)