Turkey plans an international conference "as soon as possible" with regional players and world powers to solve the Syrian crisis, its foreign minister said on Wednesday.

"We are determined to establish a broad-based forum to promote international understanding with all countries concerned" with the developments in Syria, Ahmet Davutoglu said in a televised interview.

Armed "terrorist" groups on Wednesday attacked the oil refinery in Syria's embattled central city of Homs, setting two storage tanks ablaze, state television reported.

"Armed terrorist groups shelled the refinery in Homs, setting two fuel depots on fire," the television said, adding later that the fire had been brought under control.

Yemen's President Ali Abdullah Saleh, in New York for medical treatment after agreeing to step down following months of protests, has vowed to return to vote in presidential polls, state media said.

Saleh told visitors that he would "participate" in the snap election on February 21, in which his deputy Abdrabuh Mansour Hadi is the sole candidate, Saba state news agency reported late on Tuesday.

Diehard supporters of slain Moammar Gadhafi might carry out attacks on February 17, the anniversary of the uprising against the former Libyan strongman, Libya's army chief said on Wednesday.

"We should be careful. On February 17 there might be problems from loyalists of Gadhafi," Colonel Youssef al-Mangush told reporters on the sidelines of a meeting with the military attaches of foreign embassies in Tripoli.

Russian Foreign Minister Sergei Lavrov, back from talks with Syrian President Bashar Assad, pointedly declined to say Wednesday whether Moscow asked the embattled leader to go, stressing that Syrians themselves should decide his fate.

"Any outcome of national dialogue should be the result of agreement between the Syrians themselves and should be acceptable to all Syrians," Lavrov told reporters.

Syrian forces pressed a relentless assault on the protest city of Homs Wednesday, with dozens of civilians reported killed.

The barrage of gunfire, mortars and shells was launched at daybreak and continued during the day. State television said a car bomb had ripped through the central city, killing and wounding civilians as well as security officers.

Algeria Tuesday said parliamentary seats would be increased from 389 to 462 in the general election to be held in May.

The decision was announced following a cabinet meeting headed by President Abdelaziz Bouteflika.

Russia's U.N. ambassador on Tuesday slammed efforts to "poison" relations between his country and the Arab world after Russia's veto of a U.N. Security Council resolution on the Syria crisis.

Ambassador Vitaly Churkin made the comments as he strongly rejected Arab internet reports that he had threatened the prime minister of Qatar during talks at the United Nations last week on Syria.

The United States on Tuesday voiced skepticism of promises by Syrian President Bashar al-Assad to Russia's foreign minister and said that he should instead immediately end the violence.

State Department spokeswoman Victoria Nuland said the United States would withhold judgment on Foreign Minister Sergei Lavrov's visit to Damascus but criticized Assad for making new pledges of domestic reforms.

A U.S. judge Tuesday set an October 22 trial date for an Iranian-American accused of plotting with senior Tehran officials to hire Mexican gangsters to kill the Saudi ambassador to Washington.

Federal Judge John Keenan rejected a request for more time by the defense lawyer for Manssor Arbabsiar, a used car salesman from Texas with dual U.S.-Iranian citizenship.