More than a dozen people died in clashes across Syria today, opposition activists said, as a UN Security Council call for an immediate end to the fighting fell on deaf ears.
In the worst incident, 10 civilians, including three children and two women, died when their small bus was shot up in northern town of Sermeen as they tried to flee to Turkey, the British-based Syrian Observatory for Human Rights (SOHR) said.
The organisation, which depends on a network of local contacts for its information, said it was not clear who was behind the killings. Other activists blamed the Syrian army, which has been trying to stamp out insurgents in the area.
UN secretary general Ban Ki-moon said yesterday's unanimous council statement had sent a clear message to Syria to end all violence, but Damascus appeared to dismiss the document, which is not legally binding.
At least 8,000 people have died in the year-long revolt against President Bashar al-Assad, according to UN figures issued a week ago, with a motley assortment of fighters grouped in the rebel Syrian Free Army taking on the security apparatus.
Syrian foreign ministry spokesman Jihad Makdesi said this week that 3,000 members of the security forces had died in the uprising, which Damascus blames on terrorist gangs.
Heavily armed government forces have made advances in recent weeks, sweeping armed opponents from strongholds around Syria, but they appear to be struggling to consolidate their gains.
Opposition sources said tanks had once again shelled a neighbourhood in the northeastern city of Hama, which has been a centre of revolt. Opposition sources said at least 20 people had died in army attacks there in the last 48 hours.
It is impossible to verify reports from Syria because authorities have denied access to independent journalists.
Syrian troops also turned heavy guns on Sermeen.
"Syrian forces are still not able to get inside the town because of fighting, but they are shelling Sermeen and using heavy machineguns," said SOHR head Rami Abdelrahman.
In addition, the SOHR reported heavy fighting in al-Qusair, a town close to the Lebanese border. Three residents died in the fighting and four soldiers were killed in an ambush.
And fighting erupted in southern Deraa, where several soldiers died in an ambush, he said, while Mr Assad's forces conducted raids in the eastern province of Deir al-Zor and coastal Latakia province to try to snuff out rebellion.
The security council's statement was supported by Russia and China, which had both vetoed previous Council resolutions, marking a rare moment of global unity over the crisis.
It backed a peace drive by UN-Arab League envoy Kofi Annan, which calls for a ceasefire, political dialogue and full access for aid agencies. It also says the army should stop using heavy weapons in populated areas and pull troops back.
However, Turkish foreign minister Ahmet Davutoglu said world powers needed to work together much harder to end the bloodshed, saying the Council statement was just "a common message".
"We also need to work out a common action plan," he told reporters during a visit to Vienna today.
The UN statement talks of the need for political transition in Syria, but does not demand that Mr Assad to step down - something both the rebels and the Arab League have called for.
Syria's official news agency appeared to shrug off the document, saying it contained "no warnings or signals".
Diplomats say that without swift resolution, the conflict risks spilling over into neighbouring countries and heightening already tense sectarian ties, with the uprising pitting Mr Assad's minority Alawite sect against a Sunni Muslim majority.
Underlining the dangers, several stray Syrian shells fell in the Lebanese border village of al-Qaa and nearby fields late Wednesday, wounding one person, residents said. Gunfire could be heard in the border area again today.
Human Rights Watch accused Syrian forces of using the same "brutal methods" in Qusair as it had during the siege of Homs.
"Having seen the devastation inflicted on Homs, the Russian government should stop arms sales to the Syrian government or risk becoming further implicated in human rights violations," said Sarah Leah Whitson, the group's Middle East director.
Russia has defended its long-standing military ties with Syria and has said it sees no reason to modify them.
The European Union is set to impose further sanctions on Mr Assad's inner circle tomorrow, including his wife Asma, who described herself as "the real dictator" in an email published by Britain's Guardian newspaper last week.
"Tomorrow we will decide on new sanctions, not only against the Assad regime but also against the people around him," German foreign minister Guido Westerwelle told Deutschlandfunk radio.
Referring to Moscow's support for the UN statement, he said: "Assad cannot depend on the protective hand of Russia in the violence against his own people and that could accelerate the process of erosion of the regime."
Although Russia has stuck to its demand that Assad must not be deposed by foreign powers, it has taken a sterner line this week, accusing the Syrian leadership of mishandling the crisis.
Analysts say this shows Russia is hedging its bets about Assad's fate and is positioning itself for his possible fall.
"Russia will not be focused on keeping Assad in power for the sake of keeping Assad in power," said Dmitry Trenin, director of the Carnegie Moscow Centre think tank.
British foreign secretary William Hague said international pressure on Syria would rise until there was a ceasefire.
"As long as this killing goes on we have to increase the pressure as well as consider what steps to take in the UN Security Council," he told a news conference in Rome.
Mr Hague welcomed Chinese and Russian support for the UN statement, but added: "This does not mean it is immediately possible to agree on a Security Council resolution."
Reuters