JERUSALEM (Reuters) - An Israeli air raid in south Lebanon killed four U.N. military observers on Tuesday in an attack which United Nations Secretary General Kofi Annan described as "apparently deliberate".

The deaths came on the eve of an international conference in Rome where Arab and some European nations are expected to call for an immediate end to the 14-day-old war over U.S. objections.

Earlier on Tuesday Israel vowed to pursue its war against Hizbollah and establish a no-go zone for the guerrillas in southern Lebanon until an international force arrives.

After meeting U.S. Secretary of State Condoleezza Rice, Prime Minister Ehud Olmert said both agreed that disarming Hizbollah and deploying a foreign force in its place were key to resolving the two-week-old crisis.

A total of 418 people in Lebanon and 42 Israelis have been killed in a conflict that erupted after Hizbollah abducted two Israeli soldiers in a July 12 cross-border raid.

U.N. officials said four military observers were killed when an Israeli bomb hit their base in southern Lebanon.

Annan asked Israel to conduct an investigation into the "apparently deliberate targeting" of the post.

Milos Strugar, spokesman for the UNIFIL peacekeeping force in Lebanon, said: "There were 14 other incidents of firing close to this position in the afternoon from the Israeli side and the firing continued during the rescue operation,

he said "

HIZBOLLAH COMMANDER KILLED

On the battlefield inside southern Lebanon, Israeli troops and tanks fought Hizbollah in the guerrilla stronghold town of Bint Jbeil. Israel said it killed up to 30 fighters.

Israel said its troops shot dead senior Hizbollah commander Abu Jaafar near the Lebanese border village of Maroun al-Ras. The army said he commanded Hizbollah's "central sector" on the Lebanese border.

A Hizbollah source said he was a local cultural attaché and was killed in an air strike on the southern village of Qalayleh.

Israeli Defense Minister Amir Peretz said Israel would control a "security strip" along the 80 km (50 mile) frontier and fire at anyone who entered. He did not say how wide it would be. Israeli government sources estimated its width at 3-4 km (1.9-2.5 miles).

Israel currently has full control over only one Lebanese border village after a week of fierce ground fighting.

"We will have to build a ... security strip that will be a cover for our forces until international forces arrive," Peretz told reporters.

While it was not immediately clear whether Israel planned to control the area by putting more troops into Lebanon, such talk will revive memories of Israel's occupation of southern Lebanon for 22 years until it withdrew in 2000.

Israeli warplanes bombarded south Beirut and launched 100 strikes across south Lebanon. One attack killed a family of seven, Lebanese security sources said

Hizbollah rockets killed a 15-year-old girl in an Arab Israeli town in the Galilee, medics said.

IRAN WARNING

President Bush said Rice's message was: "We care about the (Lebanese) people. We will help to get aid to the people. And that we want a sustainable ceasefire. We don't want something that's, you know, short term in duration."

Iranian President Mahmoud Ahmadinejad warned the conflict could sweep through the Middle East like a hurricane and Saudi Arabia's King Abdullah said it could ignite a wider war.

But Rice, who visited bomb-battered Beirut on Monday, said it was time for a "new Middle East".

Amid mounting international concern at civilian casualties and the plight of people displaced in Lebanon, Olmert said Israel would allow aid airlifts to reach the country.

Israel has imposed an air and sea blockade and bombed Beirut airport runways.

Lebanon says Israel's bombardment has displaced a fifth of its population. Most of its dead are civilians.

United Nations humanitarian agencies said they were still largely blocked from bringing relief supplies into Lebanon and from getting injured and very sick people to hospitals

Ground raids and air strikes have failed to stop Hizbollah firing around 1,200 rockets into northern Israeli towns and cities, where they have killed 18 civilians so far.

One of the key sticking points for a ceasefire in Lebanon is the sequence of events for a deal.

Many Lebanese politicians want a ceasefire first. Israel wants Hizbollah to leave the border area immediately and free the captured soldiers without conditions.

Israel's Lebanon offensive has coincided with its push into the Gaza Strip to try to recover a soldier captured on June 25 by Palestinian militants and halt rocket fire. Israeli forces have killed at least 121 Palestinians in the month since then.

(Additional reporting by bureau in Beirut, Rome, Riyadh and Geneva)

BUT ... IF Hizbolla Killed a 15 years old girl in Israel, So look at the other side in Lebanon, Israel killed over 100 Children in 14 days !!
So if hizbollah did a mistake , ISRAEL DID WORSE !!!