Arab League calls for international action against Syria's government over deadly chemical gas attack.
This video from a social media website apparently shows the victims of a poison gas attack in Syria.
The government of President Bashar al-Assad is being widely blamed for the attack in August.
U.S. officials say sarin nerve agent was used, killing more than 1, 400 people.
On Sunday the Arab League added its voice to calls for international action.
It issued a final resolution at the end of a meeting in Cairo.
(SOUNDBITE)(Arabic) NASSIF HITTI, ARAB LEAGUE SENIOR OFFICIAL, SAYING:
"Firstly, greatly condemning this horrific crime that has been committed by the use of chemical weapons which are globally forbidden, in contravention of humanitarian morals and international law. Secondly, putting full responsibility for such a horrendous attack on the Syrian regime and demanding punishment and prosecution for all those involved in such a crime to be tried at international tribunals as other war criminals have."
Turkey's prime minister is among those backing U.S. military intervention.
But Tayyip Erdogan is warning against short-term measures.
(SOUNDBITE)(Turkish) TURKISH PRIME MINISTER TAYYIP ERDOGAN SAYING:
"Unless efficient steps were taken the Syrian regime would be encouraged to commit new massacres and humanitarian tragedies. We are urging our allies to avoid such temporary steps taken to save the day, and we tell them this would cause grave problems."
Syria's president, seen here meeting with Iran's head of national security and foreign policy on Sunday, says the country is able to confront any external attack.
Any attack would come in mid-September at the earliest after U.S. President Barack Obama asked for congressional approval for such a move.