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Mexico searches for 57 students missing after weekend violence that killed at least 6

  • Students from a rural teachers college throw rocks at the entrance to the State Congress after marching through the streets of Chilpancingo, Mexico, Monday Sept. 29, 2014. The students were protesting after a violent weekend left at least 6 people dead and 57 students reported missing. State authorities have confirmed that 22 local policemen have been arrested following the deaths. (AP Photo/Alejandrino Gonzalez)

    Students from a rural teachers college throw rocks at the entrance to the State Congress after marching through the streets of Chilpancingo, Mexico, Monday Sept. 29, 2014. The students were protesting after a violent weekend left at least 6 people dead and 57 students reported missing. State authorities have confirmed that 22 local policemen have been arrested following the deaths. (AP Photo/Alejandrino Gonzalez)  (The Associated Press)

  • Students from a rural teachers college throw rocks at the entrance to the State Congress after marching through the streets of Chilpancingo, Mexico, Monday Sept. 29, 2014. The students were protesting after a violent weekend left at least 6 people dead and 57 students reported missing. State authorities have confirmed that 22 local policemen have been arrested following the deaths. (AP Photo/Alejandrino Gonzalez)

    Students from a rural teachers college throw rocks at the entrance to the State Congress after marching through the streets of Chilpancingo, Mexico, Monday Sept. 29, 2014. The students were protesting after a violent weekend left at least 6 people dead and 57 students reported missing. State authorities have confirmed that 22 local policemen have been arrested following the deaths. (AP Photo/Alejandrino Gonzalez)  (The Associated Press)

Mexican authorities are searching for 57 students reported missing in a southern state after weekend violence that resulted in at least six deaths and 25 wounded.

Guerrero state prosecutor Inaky Blanco says military and state authorities are looking for the students from the Ayotzinapa Superior normal school.

Blanco said Monday that 22 police from the city of Iguala have been detained in connection with the incidents.

The violence on Friday night and Saturday began when police clashed with students who had seized three buses.

Gunmen later fired shots on a highway, striking at least two taxis and a bus carrying a local soccer team.