At least 4 dead, 15 wounded in shooting at Gilroy Garlic Festival in San Francisco Bay area

What we know:

— 4 dead, including a six-year-old boy and a gunman, 15 others wounded in a shooting at the popular Gilroy Garlic Festival some 80 miles southeast of San Francisco

— Gilroy police quickly shot and killed the gunman

— Manhunt on for possible accomplice

Four people including a suspect are dead and 15 others wounded after at least one gunman opened fire Sunday evening during the Gilroy Garlic Festival in Northern California, authorities said. Hundreds of people were sent scrambling for safety, CBS San Francisco reports.

The dead include six-year-old Stephen Luciano Romero, of San Jose, authorities said. The conditions of the wounded ranged from critical to fair.

Gilroy Police Chief Scot Smithee told reporters in a late-night briefing that Gilroy officers engaged a suspect within a minute of shots ringing out and killed him.

Smithee said witnesses told authorities at least one other person may have been involved in the shooting but there was no confirmation of that or the role he or she might have played. He said a manhunt was underway for the possible accomplice.

Federal law enforcement sources told CBS News the FBI was among numerous law enforcement agencies at the scene assisting Gilroy police, who were leading the investigation.

Smithee said the suspect or suspects appeared to have cut through a wire fence at a creek bordering the festival grounds to bypass heavy security to gain access.

There was no early word on a possible motive. Witnesses told CBS San Francisco the gunman appeared to be firing at random. Some witnesses said he suddenly appeared from behind a stage before beginning to shoot.

“It’s just incredibly sad and disheartening that an event that does so much good for our community has to suffer from a tragedy like this,” Smitee added.

The shooting happened on the last day of the annual three-day festival. It features food, cooking competitions and music and attracts more than 100,000 people, The Associated Press notes.

Gilroy, a city of 50,000 some 80 miles southeast of San Francisco, is known as “The Garlic Capital of the World.”

Close call for band
The band Tin Man was doing an encore when gunfire erupted, CBS San Francisco reports.

Singer Jack van Breen said he saw a man wearing a green shirt and grayish handkerchief around his neck fire into the food area with what looked appeared to be an assault rifle.

Van Breen and other members of the band dove under the stage.

Van Breen told the station he heard someone shout, “Why are you doing this?” The person responded, “Because I’m really angry.”