Sudan and South Sudan have delayed meetings of the joint security mechanism which were scheduled to take place on Tuesday in Khartoum until next month, according to multiple sources.

The sources told Radio Tamazuj that the Chiefs of Intelligence Services of both countries were scheduled to meet to discuss border demarcation, creation of a safe demilitarized Buffer zone for the disputed areas and accusations of support to respective rebel groups.

The source further said Khartoum and Juba have recently filed complaints to the African Union (AU) against each other over support to armed opposition groups.

South Sudan declared independence from Sudan in July 2011, but much of the border between the neighbours is still hotly disputed.