The shooting happened on Friday at a “quinceanera” coming of age party in the Mexican state of Guerrero, not far from your boundary with Michoacan, where drug-related offenses, including murders, certainly are a routine event.

Like Michoacan, Guerrero, among the weakest states in Mexico, has seen an explosion in drug- murders and related abductions.

Southern Guerrero is also where 43 pupils vanished after delivered into a drug cartel, which supposedly killed them and being assaulted by municipal authorities.

The entire problem became a PR catastrophe for the authorities of president Enrique Pena Nieto.

A number of demonstrations shone a spotlight on collusion between criminal gangs and local governments wracked the area of Guerrero after, and saw tens of thousands take to the roads nationwide.

At least 324 individuals were killed in 2015 in the area between October and December, La Jornada paper figures found, with the majority of departures associated with the drug trade, BBC reported.