Air raids on an Islamic State-held village and town in Syria have killed at least 32 civilians over the past two days, activists said Monday, the Associated Press reported. The claims could not be independently verified.
The envoy declined to comment on Assad's remarks, aired by Belarus ONT television on Thursday. He says the victims were displaced civilians from Iraq and Syria.
Activist groups say the real toll has been much higher than the Pentagon's numbers reflect.
Observatory director Rami Abdurrahman says Islamic State fighters were also killed.
Russian President Vladimir Putin spoke on Monday about Moscow's own involvement with the Syrian Kurdish forces, assuring Turkey his country was not planning to arm them.
President Bashar al-Assad's Syrian government, he alleged, had detained between 65,000 and 117,000 people over the same period. A recent US decision to provide heavier arms to the Kurds has angered Turkey, a North Atlantic Treaty Organisation ally.More news: Braun Strowman could be out six months after elbow surgery
Mr Putin insisted that Moscow would not arm the Kurds because "they have other sources of obtaining the weapons".
Heavy shelling by ISIS jihadists killed at least seven people in the eastern Syrian city of Deir al-Zor on Sunday night as the Syrian Observatory for Human Rights said dozens of people were killed in suspected US-led coalition strikes in the northern Raqqa province and the town of Albu Kamal near the Iraqi border. The province links territory Islamic State militants control in Syria and Iraq.
But the activist-run Raqqa is Being Slaughtered Silently said that 22 died in the strike.
The deaths came after 12 women were killed in a US-led coalition strike yesterday.
Akayrshi is 16 kilometres away from Raqqa, which is the de-facto capital of the group's caliphate.
Kurdish-led Syrian forces backed by the US are advancing toward Raqqa after capturing several nearby towns and villages recently.