Nine people were injured on Sunday after a fire broke out at a shop and spread to six others, all selling firecrackers, in Gopalbagh on the outskirts of Uttar Pradesh's Mathura city, a police official said. "Seven shops selling firecrackers in Gopalbagh area caught fire. Nine people suffered burn injuries. It seems that the fire was caused by a electrical short circuit," Raya police station SHO Ajay Kishor said.