The UN Secretary General Ban Ki-Moon has said arming either side of the Syrian conflict would "not be helpful".
It's after the United States last night pledged to step up support for rebels - after the White House said it was certain chemical weapons have been used by the Assad regime.
Ban Ki-Moon says supplying arms could destabilise the region and inflame religious tensions.
But Nadjib Ghadban of the Syrian National Council has said the US and its allies needs to provide more than weapons, if the conflict is to be brought to an end.
He said: "This is going to take more than delivering weapons and the Obama administration can do all these things.
"The sooner they move, the more likely they will contribute to ending this conflict with the least cost."