Palestinian medical officials say Israeli troops have killed four Palestinian militants in the West Bank town of Bethlehem.
Security sources say those killed Wednesday included a member of Islamic Jihad and a member of the al-Aqsa Martyrs Brigades.
The incident came after the leader of the Islamic militant group Hamas laid out conditions for a cease-fire with Israel. Ismail Haniyeh said Israel must stop carrying out raids in the Gaza Strip, and must re-open the territory's borders. He also said a cease-fire must be "reciprocal, simultaneous and comprehensive."
Israeli Defense Minister Ehud Barak says Israel has not entered into a truce with Hamas. He said there has been no change in Israeli efforts to stop Gaza militants from firing rockets into Israel, saying there could be an escalation of fighting.
Also Wednesday, a security official says a Palestinian smuggler died when the tunnel he was digging between the Gaza Strip and Egypt collapsed on him.