Sudan has accused South Sudan of preparing more attacks through supporting rebel groups in the border areas.

Sudan army spokesman Al Sawarmi Khaled Saad said Juba is backing the Sudan People's Liberation Movement north which is planning imminent attacks in several locations in South Kordofan.

In a statement the Sudanese army said it believes 'beyond any doubt that forces have been mobilised to prepare for this attack in the next two days'.

The accusation comes days after the a tentative appearance of signs of calm between Khartoum and Juba, following the signing of an initial agreement on nationality for citizens of both countries.