The man who killed three people at the Gilroy Garlic Festival in California on Sunday has been named in local reports as 19-year-old Santino William Legan.

The suspect was killed by police after he opening fire at the event, killing three people including a six year-old boy, and injuring 15 others. A manhunt is underway for a second suspect who could be a potential accomplice, CBS News reports.

Police recovered the shooter’s backpack, a rifle, and ammunition at the scene, and have searched his home. The attacker reportedly shouted that he was shooting because he was “very angry.”

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Heavy reports that his alleged, since-removed Instagram account contained just three posts, including one photograph seemingly taken at the festival. “Ayyy garlic festival time. Come get wasted on overpriced s**t,” he allegedly wrote.

The shooter is believed to have entered the festival by cutting through a wire fence to avoid security. The motive for the attack is unknown.

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