Hussein Fayyad began a hunger strike more than a week ago to protest the failure of Abbas to follow through on the agreement, The Jerusalem Post said.
Fayyad, who isn't related to Palestinian Prime Minister Salam Fayyad, said Tuesday Abbas signed a document in 2008 appointing him as one of his advisers, but failed to live up to his promise. He also protested the failure of the Palestinian Authority to provide him with financial aid, the newspaper said.
Fayyad commanded over a Fatah-affiliated group that carried out the 1978 Coastal Road massacre in Israel, killing 38 Israeli civilians, including 13 children. He was released by Israel in a prisoner swap in 1985 and moved to Algiers.