Relief agencies prepared to enter Syria's shattered Baba Amro district of Homs on Friday after rebels left the heavily bombarded area following a 26-day siege aimed at crushing a symbol of the revolt against President Bashar al-Assad.

Defeated fighters abandoned their stronghold a day earlier and activists said Assad's army had begun hunting down and killing insurgents who stayed to cover their comrades' tactical retreat from Baba Amro.

In Geneva, the International Committee of the Red Cross said Syrian authorities had agreed that the Syrian Arab Red Crescent and the ICRC could enter Baba Amro to take food and medicine to civilians trapped by the fighting.

The Syrian Red Crescent and ICRC have received a green light from the authorities to go to Baba Amro tomorrow, Friday, in order to bring in much needed assistance including food and medical aid and to carry out evacuation operations, ICRC spokesman Hicham Hassan told Reuters in Geneva.

Armed rebels and defecting soldiers have been spearheading the revolt against Assad that began with largely peaceful protests inspired by the Arab Spring, but escalated after a bloody government crackdown.

But as the dramatic siege of Homs reached its turning point, one pro-government figure said Assad troops had broken the back of the uprising and the rebel withdrawal heralded impending victory over a Western-backed insurgency.

Reports from Homs, a bastion of rebel resistance, could not be verified immediately due to tight government restrictions on media operations in Syria.

In a rare show of unity with Western powers, Russia and China joined other Security Council members at the United Nations in expressing deep disappointment at Syria's failure to allow the U.N. humanitarian aid chief to visit the country, and urged that she be allowed in immediately.

Russian Prime Minister Vladimir Putin appeared to distance himself further from Assad in an interview with the London Times, saying he had no special relationship with the president.

It is up to the Syrians to decide who should run their country ... We need to make sure they stop killing each other, Putin told the newspaper in an interview published on Friday.

Video footage released on the internet appeared to show the bodies of American journalist Marie Colvin and French photographer Remi Ochlik being buried in Homs, where they were killed in shelling eight days ago.

French journalists Edith Bouvier, who was wounded in the same bombardment, and William Daniels escaped to Lebanon on Thursday, France's President Nicolas Sarkozy said, of the last of a handful of reporters trapped in the city.

Scattered gunfire could be heard inside Baba Amro and sporadic shelling hit nearby districts, the activists said. The overall level of combat exchanges seemed to have receded.

At least 17 rebels were put to death with knives after they were chased into nearby fields, one activist told Reuters.

Snow blanketed the city, where hundreds have died and residents lack food, fuel, power, water and telephone links, activists said.

The Free Syrian Army and all the other fighters have left Baba Amro, one activist said from Homs. They pulled out.

SCENTING VICTORY

The drama in Homs unfolded without any immediate comment from Syrian officials or the state media, but Taleb Ibrahim, a Syrian analyst close to the government, said the military's operation in Homs had broken the back of the armed groups.

It's the beginning of Syria's final victory over the Qatari, Saudi, French, American and Zionist conspiracy against Syria, he told Lebanon's Hezbollah-run al-Manar television.

A Lebanese official close to Damascus said Assad's government was determined to regain control of Homs, Syria's third city, which straddles the main north-south highway.

They want to take it, whatever happens, without restraint, whatever the cost, the official said, asking not to be named.

He said defeat for the rebels in Homs would leave the opposition without any major stronghold in Syria, easing the crisis for Assad, who remained confident he could survive.

Assad, a London-trained eye doctor, is increasingly isolated in his struggle to crush an armed insurrection. He has received significant backing from Russia which, along with China, has shielded Assad from U.N. Security Council action.

Turkish President Abdullah Gul told Reuters Russia and Iran would soon realise they had little choice but to join global diplomatic efforts for Assad's removal.

I think in time Russia will see its support has been abused by the Syrian regime. They will recognise this fact when they see the heavy weapons being used against the people in Syria. That is not very tolerable, not even for Russia, he said.

The United Nations says Syrian security forces have killed more than 7,500 civilians since the revolt began last March. Syria's government said in December that armed terrorists had killed more than 2,000 soldiers and police during the unrest.

(Additional reporting by Khaled Yacoub Oweis in Amman, Mariam Karouny, Dominic Evans, Oliver Holmes and Laila Bassam in Beirut, Stephanie Nebehay in Geneva, Steve Gutterman in Moscow and Nour Merza in Dubai; Writing by Alistair Lyon; Editing by Maria Golovnina)

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