Palestinian medical officials say two people were killed, including a teenage boy, during fighting in the Gaza strip between Hamas police and a clan allied with the rival Fatah movement.
The 13-year-old was shot in the head Saturday when he was caught in the crossfire between the Hamas forces and the Hilles clan.
A total of six people have been killed since clashes erupted between the two factions on Wednesday.
Hamas took control of the Gaza Strip in June following fighting with Fatah. Palestinian President Mahmoud Abbas's Fatah movement is based in the occupied West Bank.
In a separate development Saturday, Israeli army officials say troops fired on three Palestinian gunmen who were approaching the fence that separates Gaza from Israel, injuring at least two of them.
Some information for this report was provided by AFP, AP and Reuters.