Hamas official Mohammed Nasr said Tuesday that President Mahmoud Abbas was responsible for obstructing the completion of a Palestinian national unity government.

"Abbas clings to Salam Fayyad as prime minister during the interim government but we refuse this nomination and we affirmed to Fatah that we have a veto against Fayyad," Nasr told the London based Al-Hayat newspaper.

"We presented several names for the prime minister post in the dialogue with Fatah and we didn’t cling to one name," he added, revealing that the economist Munib Al-Masri was among the proposed Hamas candidates due to his moderate principles and good cross-party relations.

The Fatah movement reportedly does not want Fayyad for the position of prime minister, and it is Abbas who consistently supports him.

"This is what we felt during our talks with the Fatah movement," Nasr said.

There are many qualified candidates for the position of prime minister, he added quashing rumors, however, that Mohammed Mustafa was among the proposed names.