Gunmen, including off-duty policemen, temporarily halted traffic on two major roads in the Gaza Strip over the weekend amid mounting chaos ahead of Jan. 25 Palestinian elections.
In unrest Saturday protesters blocked the two main north-south roads in Gaza, demanding retribution for the killing of a policeman in a drug bust a week ago.
The protesters, who included relatives and former colleagues of the dead officer, urged Abbas to impose order in Gaza. They also called for the resignation of Interior Minister Nasser Yousef. The gunmen reopened the roads after about an hour.
The plainclothes officers said they are members of the Al Aqsa Martyrs' Brigades, a terror group linked Fatah.