Former Argentine Gen Eduardo Cabanillas has been sentenced to life in prison for running a notorious detention centre during military rule in 1976-83.
Three former intelligence officers were also convicted of murder, torture and illegal imprisonment.
Around 200 left-wing activists were kidnapped and taken to the Automotores Orletti secret prison in Buenos Aires.
Most of the victims were Uruguayan, but there were also Chileans, Bolivians, Peruvians and Cubans.
Thousands of Argentines were tortured and murdered in other centres run by the armed forces.
