Speaking through a translator, he said he would brief Kerry on the latest political and military developments.
"We are here also to ask the assistance of the US in establishing safe havens in liberated areas."
The moderate-opposition backed by the US and its allies has been fighting to oust Syrian President Bashar al-Assad, a battle Kerry admitted was against "difficult odds."
Successive attempts at launching peace talks have so far proved fruitless.
A key sticking point has remained Assad's future, with the National Coalition insisting he must step down, a demand refused by the government.
"President Assad has no legitimacy and he's not a part of the future of Syria and for that reason he needs to be prosecuted ... for the crimes he has committed against the Syrian people," Khoja insisted.
A delegation from the National Coalition will attend discussions in Geneva on Monday, when UN envoy to Syria Staffan de Mistura is to hold separate talks with the rival sides.
The situation in Syria "is simply unsustainable, catastrophic. It has profound impact... on each of the surrounding communities" with some three-quarters of the Syrian population now displaced, Kerry said.
Assad's regime "has lost all sense of any kind of responsibility," the top US diplomat said, adding there must be a transition "towards a government that represents all of the people and can repair this extraordinary damage."
Assad was "busy destroying the country in his own interests," Kerry said, adding that the Syrian leader was "enabling and attracting terrorists" such as the Islamic State which has seized control of a part of the country.
"We very much hope that in the immediate days ahead people will be able to find a new path... to restore the secular, united nature of Syria and be able to prevent this extraordinary humanitarian catastrophe."
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"We are here also to ask the assistance of the US in establishing safe havens in liberated areas."
The moderate-opposition backed by the US and its allies has been fighting to oust Syrian President Bashar al-Assad, a battle Kerry admitted was against "difficult odds."
Successive attempts at launching peace talks have so far proved fruitless.
A key sticking point has remained Assad's future, with the National Coalition insisting he must step down, a demand refused by the government.
"President Assad has no legitimacy and he's not a part of the future of Syria and for that reason he needs to be prosecuted ... for the crimes he has committed against the Syrian people," Khoja insisted.
A delegation from the National Coalition will attend discussions in Geneva on Monday, when UN envoy to Syria Staffan de Mistura is to hold separate talks with the rival sides.
The situation in Syria "is simply unsustainable, catastrophic. It has profound impact... on each of the surrounding communities" with some three-quarters of the Syrian population now displaced, Kerry said.
Assad's regime "has lost all sense of any kind of responsibility," the top US diplomat said, adding there must be a transition "towards a government that represents all of the people and can repair this extraordinary damage."
Assad was "busy destroying the country in his own interests," Kerry said, adding that the Syrian leader was "enabling and attracting terrorists" such as the Islamic State which has seized control of a part of the country.
"We very much hope that in the immediate days ahead people will be able to find a new path... to restore the secular, united nature of Syria and be able to prevent this extraordinary humanitarian catastrophe."
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