The head of the Arab League has expressed support for Russia's proposal to put Syria's chemical weapons under international control.
Nabil Elaraby told reporters that the Arab League has always been in favour of a "political resolution," adding, "Thank God."
The Arab League has blamed the Syrian government for the alleged chemical weapons attack near Damascus on 21 August, however it did not support military action without UN consent.
US Secretary of State claims to have gathered the support of "a number" of Arab League nations for a "strong international response" following talks in Paris yesterday.
Speaking ahead of his London summit with Foreign Secretary William Hague, Mr Kerry said a "global red line" had been crossed.
"All of us agreed, with not one dissenter, that Assad's deplorable use of chemical weapons, which we know killed hundreds of innocent people, including at least 426 children, on this occasion, this one occasion, crosses an international, a global red line.
"What the United States is seeking - not alone but with others, an increasing number - is to enforce the standard with respect to the use of chemical weapons."
The Arab League claimed the Syrian government was to blame for a chemical weapons attack that killed hundreds, the Associated Press reported.
The Arab League has said its 22 members are free to offer military support to Syria's rebels if they wish to, according to a statement released today.
The head of the Arab League has formally invited the Syrian National Coalition - the main grouping of opposition groups and rebels - to represent Syria on the League.
President Bashar al-Assad's government was suspended from the Cairo-based League in November 2011, eight months into the civil war.
The Arab League has asked Syria's main opposition bloc to choose a representative to attend its meeting in Doha later this month, according to a draft document seen by Reuters.
The influential group comprising representatives from 22 Arab countries has been discussing whether to offer Syria's seat to an opposition figure instead of President Bashar al-Assad's government.
Damascus was suspended from the Cairo-based League in November 2011, eight months into the civil war.
Some members of the Arab League are thought to have opposed offering the vacated seat to the Syrian National Coalition.
The Palestinian Authority has asked for an urgent summit of the Arab League to discuss Israeli "aggression" towards Gaza, the League has said.
A rocket or mortar round landed on the edge of the fortified Green Zone in Iraq's capital today where an Arab League summit, a senior security source has told Reuters.
Nine heads of state are attending the meeting.
A Reuters reporter at the scene also heard the blast.
There were no immediate reports of casualties or damage.
Arab League Syria envoy Kofi Annan will meet Syrian President Bashar al-Assad later today during a peace mission to the country where pro-democracy protests have deteriorated into bloody turmoil.
U.N. Secretary-General Ban Ki-moon also revealed that Annan plans to meet with the Syrian opposition as well before leaving the country tomorrow.