Officials said 12 criminal suspects and one police officer were killed in two days of gun battles in a southern Mexico town this week. The mayor of Chilapa in Guerrero state told residents to remain in their homes because of shooting between gunmen and police on town streets. Mayor Francisco Garcia discouraged residents from leaving their homes at night in the mountain town, located in an area where drug gangs are battling for territory. State prosecutors said Thursday that a downtown gunfight the previous night-an apparent attack on a police station-left six gunmen and the state police officer dead, and four officers wounded. On Tuesday, five gunmen and one woman died in another gun battle in the town.