January 20, 2008 - Documents published today by the National Security Archive reveal that Mexico’s secret service captured a squad of Argentine military intelligence operatives and expelled them for spying on [exiled rebel] Montoneros living in Mexico" in January 1978. At the time, the Mexican press denounced the presence of foreigners attempting to target and assassinate the leadership of the Argentine Montonero insurgents. Today, the documents of the now dismantled Mexican Federal Security Directorate confirm that agents of Intelligence Area 121 in Rosario, Argentina, "were sent [to Mexico] by the authorities in their country."

http://www.nsarchive.org