The Syrian government and rebel forces have blamed each other for a poison gas attack which is believed to have killed two people and injured scores of others.
The attack happened on Friday in Kfar Zeita near Hama. Footage on YouTube shows doctors and nurses trying to revive young men and several young children amid the crying of children. The doctors are seen massaging chests in a clean and well-equipped hospital. It is not possible to verify what has happened.
The main western-backed opposition group, the Syrian National Coalition, says dozens of people were hurt in the poison gas attack in the village of Kfar Zeita.
State-run Syrian television on Saturday blamed members of the al-Qaida-linked Nusra Front for using chlorine gas at Kfar Zeita, killing two people and injuring more than 100.
In August, the Syrian government fired dozens of shells at Ghouta near Damascus, killing several hundred people. Almost all the evidence suggests the Syrian army fired the shells containing large amounts of the nerve agent sarin. Some commentators have suggested that rebels, possibly with the help of Turkey, were able to produce large quantities of the nerve agent and carry out the attack in order to invite US military involvement.
Syria has agreed to decommission all its chemical weapons.
More than 150,000 people have been killed in Syria since mid-March 2011, according to the Britain-based Observatory.