Palestinian rockets fired at Israel despite truce. Islamic Jihad says attack was response to deadly Israeli raid hours earlier. Militants in the Hamas-controlled Gaza Strip fired at least two rockets into southern Israel on Tuesday, breaching a five-day-old cease-fire.The attack came hours after Israeli troops killed two Palestinians in a West Bank raid. The victims included an Islamic Jihad commander. The militant group later claimed responsibility for firing the rockets, saying the attack was intended to avenge the Israeli operation. The West Bank is not formally part of the Gaza truce. But the Israeli raid could be seen as violating the spirit of the cease-fire. An Islamic Jihad official said the group "cannot keep its hands tied" when its "brothers" in the West Bank are being targeted. An Israeli police spokesman said one of the makeshift rockets hit a house in the border town of Sderot, causing damage but no injuries. The second rocket fell in an open area. Prime Minister Ehud Olmert's office immediately called the attack a violation of the truce. It was not clear how Israel would react.