Jorge Videla seized power in Argentina in 1976
The former military ruler of Argentina, who is accused of human rights abuses, has been transferred to prison after being under house arrest.
Jorge Videla, 83, was convicted in 1985 of the murder of 66 people, the torture of 93 others, and the illegal detention of more than 300.
Videla, who ruled from 1976 to 1981, was sentenced to life imprisonment.
He was pardoned by President Carlos Menem in 1990 but a court cancelled that order last year.
President Menem had said he wanted to "close a sad and black stage of Argentine history" but the court said the move was unconstitutional.
Videla led a military junta which seized power in Argentina in 1976.
Under its rule, a so-called "dirty war" was waged against left-wing opponents, whom the military accused of terrorism.
Human rights groups say between 10,000 and 30,000 people were killed or disappeared before Argentina returned to civilian rule with the election of President Raul Alfonsin in 1983.