The next step after the demonstrations was the terror attack in the St Petersburg metro.
According to data from Russian means of objective control of the airspace, on 4 March, between 11:30 to 12:30, local time, Syrian aircraft carried out strikes on the eastern outskirts of Khan Sheikhoun against a large warehouse of ammunition of the terrorists and a cluster of military equipment.
The first reports of gas poisoning in Khan Sheikhoun on April 4 came at least five hours before the Russian Defense Ministry says the Syrian airstrike hit the terrorist facilities in the area: bit.ly/2oRtG7u,