US Secretary of State Hillary Clinton yesterday said a new UN resolution on Syria would be pointless if it had "no teeth", as President Bashar al-Assad would ignore it.

On a visit to Russia, Hillary Clinton said she was willing to work with Moscow on a new UN resolution on Syria but warned that the United StateswouldstepupsupporttoendAssad'sregime ifthemeasuredidnotcarryconsequences.

"There is no point to passing a resolution with no teeth because we’ve seen time and time again that Assad will ignore it and keep attacking his own people," Hillary told reporters at the end of an Asia-Pacific summit.

Russian Foreign Minister Sergei Lavrov said Saturday after talks with Hillary that he hoped to seek UN Security Council approval for a peace plan agreed in June in Geneva that called for a ceasefire and political transition.

Hillary said she hoped for progress but was "realistic" that the United States and Russia had differences on Syria.

The United States has said it is providing non-lethal assistance to the opposition in Syria, which has been a Moscow ally since the Cold War.

Meanwhile, Syrian warplanes bombed a residential district of Aleppo yesterday, killing and wounding dozens of people, a day after rebels overran army barracks in the neighbourhood, opposition activists in Syria's largest city said.

They said the air raid destroyed a residential building in the Hananu neighbourhood, one of several in eastern Aleppo under insurgent control. The death toll was not immediately clear but bodies and wounded people were being dug out from the rubble.

The aerial bombardment has burst a main water pipeline, causing serious short-