A newspaper vender uses a megaphone as he works near the gym where four people were shot dead in the Tepito neighborhood of Mexico City, Friday, June 7, 2013. Two masked gunmen stormed into the Body ... more 
A newspaper vender uses a megaphone as he works near the gym where four people were shot dead in the Tepito neighborhood of Mexico City, Friday, June 7, 2013. Two masked gunmen stormed into the Body Extreme gym on Thursday night yelling "everyone hit the floor" and opened fire, in the Mexico City neighborhood that is home to the area's biggest black market, authorities said. Mexico City Mayor Miguel Angel Mancera said preliminary investigations indicated the killings were part of a "personal grudge", and denied that the kind of large-scale drug cartel executions that have bloodied other parts of Mexico have arrived in Mexico City. (AP Photo/Gabriela Sanchez) less 
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Associated Press | Photo By Gabriela Sanchez
Fri, Jun 7, 2013 6:47 PM EDT