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Mexico prosecutor: 3 soldiers charged with homicide in army killing of 22 gang suspects

FILE - In this July 3, 2014 file photo, state authorities use crime scene tape to seal off an unfinished warehouse that was the site of a shootout between Mexican soldiers and alleged criminals on the outskirts of the village of San Pedro Limon in Mexico state, Mexico. Three soldiers have been charged with homicide in the June killings of 22 suspected gang members in southern Mexico, Attorney General Jesus Murillo Karam announced on Tuesday Sept. 30 2014. (AP Photo/Rebecca Blackwell, File)

FILE - In this July 3, 2014 file photo, state authorities use crime scene tape to seal off an unfinished warehouse that was the site of a shootout between Mexican soldiers and alleged criminals on the outskirts of the village of San Pedro Limon in Mexico state, Mexico. Three soldiers have been charged with homicide in the June killings of 22 suspected gang members in southern Mexico, Attorney General Jesus Murillo Karam announced on Tuesday Sept. 30 2014. (AP Photo/Rebecca Blackwell, File)  (The Associated Press)

Mexico's attorney general says three soldiers have been charged with homicide in the June 30 killing of 22 suspected gang members.

Jesus Murillo Karam said Tuesday that the soldiers opened fire on criminal suspects "without any justification whatsoever."

Last week, it was announced that seven soldiers and an officer were detained in the incident under the military justice system.

Those proceedings are separate from any civil criminal prosecution.