"The National Congress Party (NCP) has accused the Sudan People's Liberation Movement (SPLM) of acting in bad faith for threatening to withdraw its members from parliament.
The SPLM blamed the NCP on Monday for refusing to endorse proposals in the current parliament session that strengthen the implementation of a 2005 Comprehensive Peace Agreement (CPA).
But the NCP dismisses the charge as unwarranted.
The SPLM's proposals include a security and intelligence service, a referendum that could lead to southern Sudan's self determination, and a budget measure.
Analysts say the SPLM's latest threat could worsen tensions with its northern partners.
Ezekiel Lol Gatkuoth, head of southern Sudan's mission to the United States said that his party is 'only' promoting the wishes of the Sudanese people.
'It is not true that we are obstructing the implementation of the CPA. This is the only thing that we want to see happening. The CPA, we wanted it to be implemented in this opening of the parliament,' Gatkuoth said."
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