Three confirmed dead, 15 injured in Gilroy garlic festival mass shooting

At least three people are dead and at least 15 are injured after a gunman opened fire at the Gilroy Garlic Festival in Northern California on Sunday evening (US time). 

Videos posted on social media appear to show festival attendees fleeing and screaming. At least one loud popping sound is distinguishable in the background.

The gunman has been shot dead by police.

Some witnesses have reported a potential second suspect, but authorities have not confirmed if an accomplice was engaged in the shooting.

Initial reports claimed 11 people were gunned down after shots rang out at the annual three-day food festival.

Police responded to the scene around 5:30pm. Authorities confirmed the scene was still active as of 7:45pm (US time).

US President Donald Trump tweeted his support after being briefed on the event.

A witness named Maximo Rocha claims he saw many people on the ground, but could not be sure how many had been shot.

Witnesses have reported seeing a white, male gunman armed with a rifle, dressed in camoflauge. 

"Scariest moments of my life at the Gilroy Garlic Festival," one person tweeted. "I hope everyone made it out okay."

"One boy is dead so far and others injured. We're still waiting while they find them," tweeted another.

"The hearts of Gilroy PD... go out to the victims of today's shooting... the scene is still active," The Gilroy Police Department acknowledged the victims on Twitter.

Police have established a witness line and family reunification line.

Founded in 1979, the Gilroy Garlic Festival features food, drink, live entertainment and cooking competitions. It says it is hosted by volunteers and describes itself as "the world's greatest summer food festival".

The event is held at Christmas Hill Park in the Santa Clara County town.

More to come.

Newshub / Reuters.

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