A firework factory exploded leaving at least seven people dead in south China.<br /><br />The video, filmed in the city of Liuyang in Hunan Province on December 4, shows a plume of smoke rising up into the sky. <br /><br />A woman can be heard saying: " The firework factory exploded. It was shaking dramatically and the glass windows were broken."<br /><br />According to local reports, the windows of nearby houses were damaged by the blast. At least seven people were killed and injured people were sent to hospital for treatment.<br /><br />The cause of the explosion is unknown.<br /><br />.
