3 people are dead and at least 15 injured after a man opened fire at a major food festival in the US state of California. While was gunman was killed by officers at the scene, they are still searching for a possible second suspect. Eyewitnesses said the shooter was a white man in his 30s. The motive behind the attack is still unknown. The shooting occurred during the three-day celebration featuring food, cooking competitions and music that attracts more than 100,000 people. Sunday was the final day of this year's event.