Factbox: Massacres in Mexico's drug gang violence

By Anahi Rama MEXICO CITY (Reuters) - In late September, 43 students of a teaching college in rural Mexico were abducted by corrupt police working with a drug gang and apparently massacred. The brutal attack has triggered mass protests against President Enrique Pena Nieto's government. Following are some of the worst atrocities in drugs-related violence that has killed around 100,000 people since 2007. * September, 2014. Forty-three students were abducted afterclashes with police in the southwestern city of Iguala in whichsix people died. The government says police kidnapped the groupand handed them to hitmen, who apparently massacred them, burnedtheir bodies and ditched their remains in a garbage dump and ariver. * November, 2013. In La Barca, in the western state ofJalisco, more than 60 corpses were found. The victims arebelieved to have died in clashes between two cartels, theKnights Templar and Jalisco New Generation. Twenty localpolicemen were detained, suspected of taking part in thekilling. * May, 2012. The dismembered, decapitated bodies of 49people were dumped near the town of Cadereyta, in the northernstate of Nuevo Leon. They were believed to be immigrants, somefrom Central America, killed en route to the United States. Mostof the remains are still unidentified. * 2011. The corpses of 193 men were found at two ranches inSan Fernando, a village in the state of Tamaulipas near the U.S.border. The slaughter was apparently ordered to send a messagethat the Zetas gang controlled the territory and that peoplesmugglers had to pay the gang to move migrants through the area. * Between April and October 2011, the remains of more than330 people were found in clandestine graves in the northernstate of Durango, a stronghold of the Sinaloa Cartel, one of theworld's most powerful drug trafficking groups. Only 40 wereidentified and the rest were reburied in a mass grave. * In April 2011, dozens of people with the surnames Garza,Gaytan, Moreno or Villanueva disappeared in the municipality ofAllende in the northern state of Coahuila. Reports said the nowcaptured boss of the Zetas, Miguel "Z-40" Trevino, ordered themurder of the families of two senior lieutenants believed tohave betrayed him. * In August 2010, 72 Central American migrants were killedin the first big massacre by the Zetas, who once served as thearmed wing of the Gulf Cartel but then split with its leaders. * June, 2010. At an abandoned mine near the southern city ofTaxco, a popular tourist destination, 55 corpses were foundblindfolded and with their hands tied after a group of capturedhitmen told police where they dumped their victims. (Editing by Simon Gardner and Kieran Murray)