Israeli occupation troops have fired at a group of Palestinian youths in the southern Gaza Strip, killing three teenagers.

The incident on Saturday in the Rafah refugee camp, located along the border with Egypt, shattered weeks of calm and added to tensions surrounding plans by Jewish radicals to march on a disputed holy site in Jerusalem.

Ali Abu Zaid, a 22-year-old Rafah resident, said a group of boys were playing football in an open area when the ball was kicked toward the border fence. "The kids ran after it, and that's when we heard gunfire," he said. Palestinian hospital officials said the two dead youths were 14 and 15 years old.

The Rafah refugee camp has been a frequent flashpoint of fighting since violence broke out in late 2000. The Israeli army frequently operates in the area to halt weapons smuggling across the border.

Deadly attack

Since the 8 February declaration, a total of 13 Palestinians have been killed in clashes with Israel. But Saturday's shooting was the deadliest single incident. Five Israelis have also died during the period, all killed in a 25 February  bombing outside a Tel Aviv nightspot.

The chief Palestinian peace negotiator, Saib Uraiqat, said the shooting threatens peace prospects. "Every time we have such a violation of the cease-fire it really endangers the fragile quiet," he said. "We urge the Israeli government to refrain from any acts that could endanger the cease-fire."

Hamas, the largest Palestinian resistance group, pledged to avenge the deaths of the three teens. "The Palestinian people cannot stay silent in the face of this crime and it cannot pass without punishment," said Said Siyam, a Hamas leader in Gaza.

He would not comment on whether Hamas remained committed to the truce. Muhammad Hindi, leader of the Islamic Jihad resistance group, called the shooting an "ugly crime" and said the Palestinians would have to "reevaluate" the cease-fire.

But he too declined to say whether the truce would be called off. Shortly after the shooting, Palestinians fired five mortar shells toward Jewish settlements in Gaza, causing no injuries, the army said.

PHOTO CAPTION

Palestinians clean the body of 15-year-old Khaled Ganam after he was killed by Israeli troops, at the Rafah refugee camp in southern Gaza Strip, April 9, 2005. (REUTERS)