Palestinian witnesses say Fatah and Hamas gunmen have fought a fierce battle in the Gaza Strip, wounding at least three people.
Residents say the fighting broke out early Wednesday in the town of Beit Hanoun and that the wounded were all civilians.
The violence took place hours after Hamas and the Fatah faction of President Mahmoud Abbas tried again to reach an agreement on forming a unity government.
Separately, Palestinian and Israeli military authorities say Israeli troops killed one man and wounded two others as they crawled near the border fence separating Israel from the Gaza Strip.
Officials said the dead man was a teenager and was unarmed. Both of the injured were briefly arrested and sent to nearby hospitals.
On Tuesday, masked gunmen entered an empty resort in the Gaza Strip and blew up several rooms.
The resort's manager said the gunmen claimed to be from al-Qaida and threatened to bomb assets of Mohammed Dahlan, a key aide to Palestinian President Mahmoud Abbas. Dahlan denies he owns the resort.
Israeli officials have warned that al-Qaida is trying to infiltrate the Palestinian territories. But Palestinian security officials say there is no evidence al-Qaida is operating in Gaza.
Some information for this report was provided by AFP, AP and Reuters.