Libya's new authorities resumed talks on Tuesday with local leaders in Bani Walid, one of the last bastions of Moammar Gadhafi, bidding to end a tense standoff over the oasis town.

Negotiations for the peaceful surrender of Bani Walid, which anti-Gadhafi fighters encircled last week, had collapsed Sunday, and the latest talks were aimed at reassuring Warfalla tribesmen, elders and the local community.

A planned visit to Damascus Wednesday by Arab League chief Nabil al-Arabi in which he had been due to press the bloc's calls for reform has been postponed, diplomatic sources said.

"The visit has been put off to an undetermined date at Syria's request and a new meeting will be arranged soon," one diplomatic source told Agence France Presse on Tuesday.

A large convoy of civilian and military vehicles from Libya crossed into Niger but officials denied Tuesday that Libya's toppled leader Moammar Gadhafi was aboard.

The convoy entered the Sahelian country late Monday and drove through the city of Agadez, a stronghold of the former Tuareg rebellion Gadhafi once supported, a local military source said on condition of anonymity.

Syrian security forces killed two people, including a teenager, and another five bodies were found in the flashpoint central province of Homs on Tuesday, activists said.

"Two people died and two were wounded by gunfire south of the industrial town of Rastan" near Homs, where they were employed, the Syrian Observatory for Human Rights told Agence France Presse, adding one of those killed was aged 15.

Turkish Prime Minister Recep Tayyip Erdogan announced a total freeze on military and trade ties with Israel and threatened Tuesday to visit Gaza as the one-time allies' diplomatic spat intensified.

Only hours after Israel said the continued presence of its defense attache at the embassy in Ankara indicated there was no definitive break with Turkey, Erdogan declared a suspension to all military and commercial relations.

U.N. Secretary-General Ban Ki-moon urged the world community on Tuesday to take action on the situation in Syria.

While Ban stopped short of calling for military intervention, he delivered some of his strongest statements yet condemning the violence he says Syrian President Bashar Assad is perpetrating against his people. Ban said it is time for U.N. member nations to unite and take "coherent measures."

Israeli war planes bombed an alleged weapons manufacturing site in the central Gaza Strip overnight after a rocket was fired from the Palestinian territory, Israel's army said on Tuesday.

The rocket landed in southern Israel but caused no damage or injuries, the army said. There were no immediate reports from Gaza of injuries from the Israeli strike.

Moammar Gadhafi is in top health and planning his country's defense, his spokesman said, as new regime fighters voiced concern over civilians trapped in the besieged town of Bani Walid.

While anti-Gadhafi fighters were poised to strike at the loyalist oasis town at the slightest hint of provocation, Gadhafi's spokesman Moussa Ibrahim insisted that the toppled leader was busy planning to re-take his country.

NATO's mission in Libya has moved significantly closer to success and will end soon, the military alliance's secretary general said on Monday.

"Our operation to protect civilians has moved significantly closer to success, but we are not there yet," Rasmussen told a news conference, reiterating that air strikes will continue as long as civilians are under threat.

The International Committee of the Red Cross said Monday it was for the first time granted access to a Syrian detention center.

"The Syrian authorities have granted the ICRC access to a place of detention for the first time," ICRC president Jakob Kellenberger, who held talks with Syrian President Bashar al-Assad on Monday, said in a statement.