"We have registered... attacks on the settlements of Jabla, Ma'arrat Hurma, Kafr Nabl, Dadikh, Mellaja in the province of Idlib... from the direction of the positions of the Jabhat al-Nusra* organization", Shcherbitsky said.
The localities of Kherbet-Jezraya, Urum al-Kubra, and Arbikh in the province of Aleppo were also shelled, he said, adding that there had been a total of nine attacks on settlements in the two provinces.
The Russian military police conducted patrols in the provinces of Deir ez-Zor and Aleppo, Shcherbitsky added.
On Tuesday, the terrorist group shelled the settlements of Urum al-Kubra and Mellaja in the two provinces.
On 5 March, Russian President Vladimir Putin and his Turkish counterpart, Recep Tayyip Erdogan, agreed on a ceasefire in Idlib, which started at midnight. The sides also agreed to create a security corridor six kilometres (3.7 miles) north and south of the M4 highway in Syria, which connects the provinces of Latakia and Aleppo.
Militants remain in control of a small pocket of Idlib province in northwest Syria.
*Hayat Tahrir al-Sham (formerly known as Jabhat al-Nusra) is a terrorist organization banned in Russia and many other countries.