Two former leaders during Argentina's military rule have been found guilty of overseeing the systematic theft of babies from political prisoners.

A court in Buenos Aires sentenced Jorge Videla to 50 years in prison and Reynaldo Bignone to 15 years.

They are already serving lengthy jail sentences for crimes committed under military rule, between 1976 and 1983.

At least 400 babies are thought to have been taken from their parents, while they were held in detention centres.

The verdict is the culmination of a trial that began in February 2011.