A STAMPEDE broke out at a memorial to dead rapper Nipsey Hussle last night after terrified fans feared they heard gunshots, according to reports. Nineteen people were reportedly injured in the chaos at the vigil, which was being held at the Marathon Clothing store in LA where the Grammy-nominated star, 33, was shot dead. Dramatic footage showed the moment a stampede broke out as terrified fans fled across the parking lot where the memorial was being held. ABC News reported that some in the crowd heard a loud noise they thought was a gunshot and fled for safety. Following the stampede it emerged that one person had been stabbed and six others sustained injuries from unknown causes, an LAPD officer told USA Today. One reporter from the newspaper said they saw a male stab victim lying on the ground alongside a woman who appeared to have been knifed as well. The LA Fire Department rushed 19 people to hospital with at least two critically wounded, a spokeswoman told USA Today. At least one of the injured victims was hit by a car, it has been reported. Dramatic pictures from the scene show people being treated by emergency workers while witnesses…