Syria: William Hague tells Friends of Syria refusing sanctions akin to allowing killings But his defection is the clearest signal yet that some in Assad's inner circle think his days in power are numbered, as an uprising that began in March 2011 with a groundswell of peaceful protest turns into a civil war with strong sectarian overtones. While the lightly armed rebels are no match for Syria's large and well-equipped army, their hope lies in eroding loyalty and conviction within Assad's establishment to the point where it loses its hold on power. Syrian armour pushed into the rebel-held northern town of Khan Sheikhoun on Thursday, activists said, adding 11 victims to a death toll dissidents and Western leaders put at over 15,000. French President Francois Hollande urged stiffer sanctions against Assad and more support for the rebels at the start of a meeting of Western and Arab states who back the uprising. "Bashar al-Assad must go," Hollande told a meeting of foreign ministers and senior diplomats from the "Friends of Syria" group. It's in the interest of Syria, of its neighbours and everybody who wants peace in the region. Clinton renewed Washington's call for a U.N. sanctions resolution, something that was twice blocked last year by the veto power held by Moscow and Beijing in the Security Council. And she called for states to penalise Russia and China: "I will tell you very frankly, I don't think Russia and China believe they are paying any price at all - nothing at all - for standing up on behalf of the Assad regime," Clinton said. The only way that will change is if every nation represented here directly and urgently makes it clear that Russia and China will pay a price, because they are holding up progress - blockading it. That is no longer tolerable. The Paris meeting will, among other things, focus on firming up sanctions and closing loopholes such as continued Greek purchases of Syrian phosphates, French Foreign Minister Laurent Fabius told the newspaper Aujourd'hui en France. Tlas, whose father Mustafa was defence minister under Assad's father for three decades, is a Sunni Muslim, from the majority community that has been the focus of the uprising against a ruling class rooted in Assad's minority Alawite sect.