"We have registered three attacks on... settlements in the province of Aleppo from the direction of the positions of the Jabhat al-Nusra* terrorist organization", Shcherbitsky said.
He added that Russian military police units had conducted patrols in the provinces of Raqqa, Al Hasakah, and Deir ez-Zor.
On 17 August, Turkish troops were hit by an unidentified explosive device during the twenty-second joint patrol of the M4 highway by Turkish and Russian military.
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.