The ousted Fatah Party is boycotting today's session of the Hamas-dominated parliament.

Fatah says it opposes the militant group's repeal of new powers for Palestinian Authority President Mahmoud Abbas.

Hamas has 74 seats in the new parliament and Fatah has 45. On Monday, Hamas nullified powers the outgoing Fatah-ruled parliament gave to Abbas to cancel the new parliament's laws and appoint Fatah officials to key positions. Fatah lawmakers responded by walking out of the parliament chamber.

Fatah's parliamentary faction leader served notice of the boycott and said the party would file suit against Hamas in the Palestinian Supreme Court.