The United Nations scrambled Friday to find fresh troops for its beleaguered Golan Heights peacekeeping force, which Russia said is in "dire straits" as it offered to help.

President Vladimir Putin said Russian troops could replace almost 380 soldiers that Austria says it will withdraw from the ceasefire zone between Israel and Syria because of the increased danger from the Syrian civil war.

The U.N. force in the Golan Heights was thrown into disarray Thursday after Austria withdrew its troops and two peacekeepers were injured as Syrian government and rebel fighters battled for a border crossing.

Peacekeepers from the Philippines and India were wounded by mortar shrapnel as the Syrians fought for the strategic crossing, according to diplomats.

Caretaker Foreign Minister Adnan Mansour asked Lebanon's ambassador to the U.N. late Saturday to file an “urgent” complaint with the Security Council over Israel's violations of Lebanese airspace.

A statement said that Mansour asked Nawwaf Salam to submit the complaint against Israel “over its flagrant violation of Lebanese sovereignty and related international resolutions mainly resolution 1701.”

Syria's opposition on Friday urged the U.N. Security Council to take immediate action after the United States said for the first time the regime probably used chemical weapons.

"It is time for the U.N. Security Council to act" on Syria, an official from the main opposition National Coalition told Agence France Presse.

Nearly seven million people need humanitarian assistance in Syria, a senior United Nations official said Thursday, criticizing Damascus for hampering aid distribution.

"The needs are growing rapidly and are most severe in the conflict and opposition-controlled areas" of the civil-war ravaged country, the global body's humanitarian chief Valerie Amos told the U.N. Security Council.

Prime Minister Najib Miqati welcomed on Friday a U.N. Security Council statement which underscored its grave concern at the arms trafficking and repeated weapons fire across the Lebanon-Syria border.

It is a “constructive statement” and “we all agree on,” Miqati said following talks with Speaker Nabih Berri in Ain el-Tineh.

President Michel Suleiman has stressed that Lebanon will continue to implement a U.N. resolution that halted the Israel-Hizbullah war in 2006 in an attempt to restore sovereignty on all its territories.

“With the support of the international community, Lebanon will continue to work to implement Security Council resolution 1701 in an effort to restore sovereignty on all its territories,” Suleiman said on Thursday during a dinner banquet thrown by the President of Ivory Coast, Alassane Ouattara, in his honor.

U.N. Under-Secretary-General for Political Affairs Jeffrey Feltman has warned that Syria's war would pull Lebanon into its “vortex” and encouraged Lebanese officials to ensure that the parliamentary elections take place on a consensual basis.

"Even tentative steps to dialogue are struggling to take root. The destructive military spiral churns more forcefully each day and threatens to pull its neighbors, most notably and worrisomely Lebanon, into its vortex," Feltman told the U.N. Security Council about the fighting between the troops of Syrian President Bashar Assad and rebels seeking to topple him.

World powers on the U.N. Security Council united to condemn North Korea's latest nuclear test Tuesday, and the United States led calls for tougher sanctions against the pariah state.

Pyongyang said its provocative detonation of a nuclear device at an underground site was a response to U.S. "hostility" and threatened still stronger action, defying warnings of United Nations measures.

North Korea said its nuclear test Tuesday was only a "first" step and warned of stronger action if it was faced with tougher sanctions as a result.

"The latest nuclear test was only the first action, with which we exercised as much self-restraint as possible," the foreign ministry said in a statement carried by the country's official news agency.