(Adds Olmert comments) By Benny Dagan KIRYAT SHMONA, Israel, June 17 (Reuters) - Suspected Palestinian fighters in Lebanon hit a northern Israeli town with two Katyusha rockets on Sunday, Lebanese and Israeli officials said. No one was hurt. Lebanon's Hezbollah guerrillas, who fired thousands of Katyushas into Israel a year ago, denied they launched the first such attack since that war. In all, three rockets were fired. Israeli forces did not retaliate and the government made clear it wanted no escalation into another border war. Israeli Prime Minister Ehud Olmert said the rocket firing had made for a "very disturbing day" but he pointedly stopped short of threatening any Israeli military response. Olmert was speaking in New York at a meeting with U.N. Secretary-General Ban Ki-moon during a three-day visit to the United States. He will meet President George W. Bush on Tuesday. An Israeli official travelling with Olmert said the firing was apparently carried out by Palestinians and not by Hezbollah. A Lebanese security source also blamed Palestinians, though any motivation was unclear. The United Nations Interim Force in Lebanon (UNIFIL) peacekeeping force called it a "serious breach" of last year's ceasefire and urged restraint. It sent out patrols with the Lebanese army to find the attackers and stop further incidents. Olmert said that the attack on the town of Kiryat Shmona "re-emphasises the role of UNIFIL and Lebanon's army in southern Lebanon". Lebanese forces found a wooden launch platform armed with timers, along with a fourth rocket that did not fire. The attack came a few hours after a new, Western-backed Palestinian emergency government was sworn in in the West Bank after a week of bloody Palestinian faction fighting that saw the Islamist group Hamas seize control in the Gaza Strip. Hamas and Hezbollah follow different branches of Islam but have some things in common, including support from Iran and Syria. The 400,000 Palestinian refugees in Lebanon have also been affected in recent weeks by fighting between Lebanese troops and al Qaeda-inspired Palestinian Islamists in a camp in the north. CAR DAMAGED Two Katyushas landed in an industrial park in Kiryat Shmona, Israeli police said. One damaged a parked car. There were no casualties. "We were outside the factory when suddenly there was a frightening boom," one man told Israel's Channel 2 television. "We saw a black cloud in the sky and we came over to inspect the damage and we saw this," he said, pointing to a hole in the road next to the damaged car, which had apparently been empty. Lebanese Prime Minister Fouad Siniora said the aim was to embarrass his army and UNIFIL: "The political aim of this incident ... is to cast doubt on the ability of the army and UNIFIL to protect the south. This attempt completely failed." A Hezbollah spokesman said: "We had nothing to do with this." The Lebanese army said in a statement: "At 1710 (1410 GMT), unknown elements fired three Katyusha 107mm rockets towards the occupied Palestinian territories. An army unit immediately conducted a search of the suspected launch area where it found a fourth rocket, ready to be launched and equipped with a timer." (Additional reporting by Ori Lewis, Adam Entous and Alastair Macdonald in Jerusalem; Yara Bayoumy, Laila Bassam and Nadim Ladki in Beirut and Jeffrey Heller in New York)
