Witnesses say gunmen have opened fire on the motorcade of Palestinian Prime Minister Ismail Haniyeh.
Palestinian officials say Mr. Haniyeh was not hurt in the attack Friday in Gaza.
The incident comes amid a power struggle between the ruling group Hamas of Prime Minister Haniyeh and the more moderate Fatah party of Palestinian President Mahmoud Abbas.
The Associated Press reported that disgruntled relatives of a Fatah activist killed in recent fighting with Hamas were responsible for the attack.
Some information for this report was provided by AFP, AP and Reuters.