RAMALLAH (West Bank): Palestinian gunmen set fire to the office of the Palestinian prime minister in the West Bank city of Ramallah on Monday, witnesses said.   
 
The office was unoccupied at the time.
 
Prime Minister Ismail Haniyeh of the ruling Hamas Islamic militant group, is based in the Gaza Strip and does not have access to the Ramallah office because of Israeli curbs on his travel.