Former Contra rebel leader Aristedes Sanchez, arrested last week during disturbances in eastern Nicaragua, left Monday for Miami, and his wife said he had been expelled after being tortured.

Authorities said Sanchez had been sent to Miami for medical treatment but declined to comment further.Sanchez's wife, Cecilia, told reporters before leaving Managua about 7 p.m. that Interior Minister Carlos Hurtado called Sanchez to tell him he could either leave the country for the six years of President Violeta Chamorro's government, or stay in jail for the same period.

Sanchez was arrested last Thursday at the height of disturbances over roadblocks set up by former Contra rebels in Boaco and Chon-tales provinces to pressure the government into honoring promises it made for their resettlement.