Crowd injured at firework display in California, USA
5 July 2013 Last updated at 10:57 BST
More than 20 people have been injured during a fireworks display in California to celebrate Independence Day.
Authorities said a wooden platform holding live fireworks tipped over, sending the pyrotechnics into the crowd at a park in Simi Valley.
Mobile phone footage filmed by a spectator showed fireworks exploding close to the ground, apparently out of control.
Four people were listed in serious condition, but their injuries were not believed to be life-threatening.