The State Department said he was "horrified" Thursday by the strikes of the Syrian air force has made thirty dead, including children, in the village of Deir al-Assafir, a rebel stronghold in the east of Damascus.
"The United States is appalled" by the strikes "against a school and a hospital in the suburbs of Damascus (...) We condemn in the strongest terms all attacks directly targeting civilians," said the department State in a statement.
At least 33 people, including 12 children, were killed in the strikes, according to the Syrian Observatory for Human Rights (OSDH).
The State Department spoke to him "more than 20 people killed and dozens injured, including children, women and people who wore their rescue," in a rare reaction denouncing "air strikes attributed to the regime (of President Syrian President Bashar) al-Assad. "
"The regime has pledged to fully implement the resolution 2254 of the UN Security Council, which calls for an immediate end to all attacks against civilians," insists American diplomacy.
According to the director of the OSDH Rami Abdel Rahman, the strikes in Deir al-Assafir constitute "most serious violation of the cease-fire in the eastern Ghouta" region east of the capital Damascus.
A truce between the regime and the rebels was introduced in Syria in late February under the aegis of Russia and the United States. It does not concern the jihadists of the Islamic State organization (EI) and the Al-Nusra Front, the Syrian branch of Al Qaeda.
Eastern Ghouta is known to be a stronghold of the influential army faction Jaich al-Islam (Army of Islam) who signed the truce. Fighters of Al-Nosra Front are also in this area.
The main formation of the Syrian opposition in exile had also denounced the raids, calling on the international community to take "serious and urgent measures" after the attack.
Since the beginning of the Syrian conflict in 2011, over 270,000 people died and millions more have had to flee their homes.