Washington The White House has renewed its call for an immediate end to offensive operations in Syria, The Associated Press (AP) reported.
White House spokeswoman Sarah Huckabee Sanders says Syria is terrorizing hundreds of thousands of civilians with airstrikes, artillery, rockets and a looming ground attack.
The regime's use of chlorine gas as a weapon only intensifies this, she added.
More than 500 people have been killed since last week in the Eastern Ghouta region, where activists on Sunday reported a suspected poison gas attack.
On Saturday, United Nations Security Council adopted a resolution calling for a 30-day nationwide ceasefire in Syria. But the resolution has so far failed to stop the carnage in the war-torn country.
The United States last year bombed a Syrian airbase in retaliation for a chemical weapons attack against civilians. The spokeswoman said that President Donald Trump put the Assad regime on notice some time ago.
Source: International Islamic News Agency