( CNN ) -- A group of masked gunmen stormed a popular bar in the Mexican city of Chihuahua late Friday , killing 15 people , including two journalists , state prosecutors said Saturday . At least 10 suspects entered the Colorado Bar wearing what looked like police uniforms and opened fire on the crowd inside the bar , according to Carlos Gonzalez , a spokesman for the Chihuahua state attorney general 's office . Eleven people died at the scene , and the other four died en route to the hospital . The victims ranged in age between 25 and 72 . Among them was Hector Javier Aguirre Salinas , the owner of a news website and a respected journalist . A second journalist , Francisco Javier Moya -- who in years past had served as the news director for a radio station in Ciudad Juarez -- also was killed . `` The crime of our partners and the rest of those killed in the attack , can not go unpunished , '' Roberto Delgado , president of the Association of Journalists in Juarez , said in a statement on the killings . Prosecutors said they collected at least 30 shell casings from a variety of weapons , including several bullet casings from an AK-47 . Northern Mexico has been ravaged by battles among rival drug cartels , police and government troops for the past several years . More than 47,000 people have been killed since the Mexican government launched a crackdown on drug traffickers in December 2006 , according to government statistics . Journalist Arturo Chacon contributed to this report for CNN .
Prosecutors said at least 10 gunmen stormed the Chihuahua bar Friday night . The attack left six people dead and seven others wounded, including a police officer, authorities said. The gunmen were dressed in police uniforms , state prosecutors said .