MEXICO CITY — The Mexican farmers who took up arms against drug-gang violence and crime in the mountains of southern Mexico have turned over to authorities 11 of 53 people that the vigilantes have detained over the last month as suspected criminals.

Movement leader Bruno Placido says the 11 are the detainees accused by local residents of the most serious crimes, such as murder, kidnapping and extortion. The vigilante movement sprang up in the Pacific coast state of Guerrero after a series of kidnappings in early January.

The Guerrero state government says Placido's group has agreed to turn over "the first 20" detainees, implying more will eventually follow. But Placido says a residents assembly in the township of Ayutla will determine the next step.

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  • An armed and masked man takes a sip of coffee as he guards a roadblock at the entrance to the community of El Pericon near Ayutla, early Saturday, Jan. 19, 2013. Hundreds of men in the southern Mexico state of Guerrero have taken up arms to defend their villages against drug gangs, a vigilante movement born of frustration at extortion, killings and kidnappings in a region wracked by violence. (AP Photo/Dario Lopez-Mills)

  • In this photo taken Friday, Jan. 18, 2013, a man holds two small hand guns while guarding a roadblock in the town of Las Mesas, near Ayutla, Mexico. (AP Photo/Dario Lopez-Mills)

  • In this photo taken Friday Jan. 18, 2013, masked and armed men read newspapers as they stand guard at the entrance to the town of Ayutla, Mexico. (AP Photo/Dario Lopez-Mills)

  • In this photo taken Friday Jan. 18, 2013, masked and armed men sit in the back of a pick-up truck at the entrance to the town of Ayutla, Mexico. (AP Photo/Dario Lopez-Mills)

  • In this photo taken Friday Jan. 18, 2013, a masked and armed man gestures to police driving by as he stands guard at a roadblock in Las Mesas, near the town of Ayutla, Mexico. (AP Photo/Dario Lopez-Mills)

  • Armed and masked men guard a roadblock at the entrance to the community of El Pericon near Ayutla, early Saturday, Jan. 19, 2013. (AP Photo/Dario Lopez-Mills)

  • An armed and masked man guards a roadblock at the entrance to the town of Cruz Quemada, near Ayutla, early Saturday, Jan. 19, 2013. (AP Photo/Dario Lopez-Mills)

  • In this photo taken Jan. 18, 2013, a masked armed man checks the identity of a driver at a roadblock at the entrance to the town of El Pericon, near Ayutla, Mexico, Friday, Jan. 18, 2013. (AP Photo/Dario Lopez-Mills)