Three people have been killed and 15 injured after a gunman attacked a food festival in California.

The gunman was shot dead by police shortly after he began firing, although police are investigating reports that a second suspect may still be at large.

The Gilroy Garlic Festival was about to end for the weekend on Sunday evening, when shots were fired at the site.

There was "a white man in his early to mid-30s firing a rifle," eyewitness Julissa Contreras told NBC.

The suspect entered the festival after cutting through a perimeter fence with a tool, Gilroy Chief of Police Scot Smithee told reporters. He said witnesses reported that a second suspect may have been involved, possibly in a support role.

Officers were already at the site and responded to the shooting in less than a minute, Chief Smithee added.

Video posted on social media showed people running away from the festival, which took place 30 miles (48km) south of San Jose.

"What's going on?" a woman's voice asks in one video. "Who'd shoot up a garlic festival?"

BBC