NAIROBI, Kenya (AP) _ Peace talks scheduled for next week between rebels in southern Sudan and the Sudanese government have been postponed indefinitely, a rebel spokesman said Saturday.

Samson Kwanje of the Sudan People's Liberation Army said the Foreign Ministry of Kenya _ where the talks were to be held _ sent the rebels a letter Friday saying there would be no discussions Monday as announced by the Sudanese government.

The reason for the postponement was not immediately clear, and Kenyan and Sudanese authorities were unavailable for comment.

An earlier round of talks scheduled for April 20 was postponed at the request of the Sudanese government, which accused the rebels of violating a cease-fire.

The rebels have been fighting various Sudanese governments since 1983 for more autonomy for the largely Christian and animist people of southern Sudan. About 1.9 million people have been killed in the fighting and resulting famines.