A 12-year-old boy has died after being shot by US police for brandishing what turned out to be a fake gun at a recreation centre in Cleveland.<br /><br />The victim has been identified as Tamir Rice. Police say he was shot twice after failing to respond to an order to raise his hands.<br /><br />The incident has already led to calls for fake guns to be tightly controlled with one local lawmaker wanting them now to be brightly coloured.<br /><br />It comes as people in Ferguson await a grand jury decision on whether a white policeman should be charged in the Michael Brown killing this summer.<br /><br />The St. Louis suburb has become a flashpoint for US race relations since the 18-year-old was shot dead. In anticipation of the announcement Missouri has declared a state of emergency and called in National Guard troops to back up police, which protesters have criticised as heavy-handed.