Russia says the "gas attack" was a mere airstrike that hit a chemical weapons storage facility of rebels.
The international community blames Damascus for a chemical attack against civilians.
Spokeswoman for the Ministry of Foreign Affairs of the Russian Federation Maria Zakharova described the released videos of the aftermath of the chemical strike as staged and provocative.
Attention! The videos below contain disturbing images and are not recommended to children and sensitive people.
According to the World Health Organization (WHO), the symptoms of the victims correspond to that caused by a gas attack. The absence of visible injuries and other signs indicate neurotoxic lesion, the WHO said.
On April 4, Western media, referring to the Syrian Observatory for Human Rights, said that warplanes belonging to Russia or the Syrian government targeted the city of Khan Sheikhoun in the northwestern province of Idlib with gases. The attack is reported to have killed at least 58 people, including 11 children, and injured dozens.