Multiple casualties have been reported after a shooting during Chinese Lunar New Year celebrations in California.

Police are responding to the attack in Monterey Park, a city just east of Los Angeles, with videos on social media appearing to show officers swarming the area and firefighters treating victims.

Tens of thousands of people had gathered on Saturday afternoon for a two-day festival, which is considered one of the largest in the region.

According to the LA Times, the shooting took place at around 10pm (6am UK time).