Qusair in heavy bombardment by army

syria conflict keeps on , here has been an upsurge in fighting in the strategic Syrian town of Qusair, both sides in the conflict say.
The army, which began an offensive to recapture Qusair last Sunday, says it has now launched a three-pronged attack on the rebel-held town.
The rebels say they are under heavy bombardment from Lebanese Hezbollah militants, who back Syria's government.
Meanwhile the main opposition group has said it will attend a peace conference only if the Syrian leader steps down.
The international conference, which Russia and the US are attempting to convene, would take place in Geneva next month.
The opposition said it welcomed the conference but demanded that President Bashar al-Assad leave power first.
A spokesman for the National Coalition, Louay Safi, told the BBC: "We would like to find a political solution. But we don't want to be deceived again by this regime, which has deceived us many times.
Previous efforts to find a political solution to the conflict have foundered on preconditions from the two sides.