Gunmen in the Gaza Strip have shot dead a well-known Fatah militant during a clash at the Bureij refugee camp.
Rivalry between the two Palestinian factions is taking a toll
Mohammed Shahadeh, leader of al-Aqsa Martyrs Brigades in the camp, was shot outside his home, officials say.
Fatah officials blamed Hamas for the killing - the latest in the current stand-off between the two Palestinian rivals that has left about 20 dead.
Meanwhile, Palestinian police blocked streets to protest over non-payment of salaries by the Hamas-led government.
The protest, which began on Saturday, has forced many shops to close.
Tyres were set on fire on main roads, sending black smoke billowing over Gaza.
On Saturday, prominent Palestinians met Prime Minister Ismail Haniyeh, and asked him to consider naming a cabinet in an effort to halt the ongoing violence.
Bassam Assalhi, one of the group said: "We stressed the first priority and choice is to form a government of national unity but if peace efforts [between Fatah and Hamas] falter then we think a government of national figures should be considered."
The Hamas-led Palestinian Authority has struggled to pay municipal salaries since it came to power in March.
Principal international donors, including the United States and the European Union have boycotted the Palestinian government over Hamas's refusal to recognise the Jewish state or to renounce violence.