Speaker talks with students about Plan Mexico » MEXICO-OAXACA/

Federal police officers detain a man during an operation outside Oaxaca University in Oaxaca City in this November 2, 2006 file photo. Amnesty International urged the Mexican government on July 31, 2007 to investigate suspected torture and abductions by state officials during months of protests in the city of Oaxaca in 2006. Amnesty International Secretary General Irene Khan called for the probe during a visit to Oaxaca, saying Gov. Ulises Ruiz’s government appeared to be implicated. REUTERS/Daniel Aguilar/Files (MEXICO)