The Palestinian group Hamas says its fighters have taken over President Mahmoud Abbas' compound in the Gaza Strip, which Hamas says was the last stronghold in the area of its rival faction, Fatah.
Hamas radio announced the takeover of the Gaza City compound late Thursday.
Mr. Abbas was in the West Bank at the time, which is still controlled by his Fatah group.
Meanwhile, Palestinian Prime Minister Ismail Haniyeh of Hamas called Mr. Abbas' decisions to dismiss him from the unity government "hasty."
Speaking early Friday on Palestinian television, Mr. Haniyeh said the unity government will continue working the best it can for the Palestinian people.
Fierce fighting between Hamas and Fatah in recent days has killed at least 90 people.
On Thursday, Hamas fighters overwhelmed Fatah forces and tightened their grip on the Gaza Strip. At least 30 people died in the fighting, and police say about 100 armed members of Fatah crossed into Egypt at one point to escape Hamas' military campaign.
In Washington, White House spokesman Tony Snow said the Gaza fighting is a "source of profound concern." Snow accused Hamas of "committing acts of terror" against the Palestinian people.
Fatah and Hamas formed their unity government in March in a bid to stop factional violence.