The Russian Defence Ministry has reported that Russian combat jets have carried out four airstrikes on terrorist positions in Idlib, using coordinates provided by Turkey.
"Using the coordinates provided by the Turkish side, four bomb strikes were carried out by the Russian Aerospace Forces aircraft. As a result, large concentrations of militants and field artillery positions from which the Turkish observation post had been shelled were destroyed", the Russian Defence Ministry said in a statement.
The move came as a response to an attack by al-Nusra* allies on a Turkish Army observation post despite agreeing to a ceasefire, according to the ministry.
"Our observation post in Al-Sharia in the Idlib de-escalation zone was attacked from the territory under control of the Syrian government... Three our servicemen were lightly injured", the Turkish Defence Ministry said in a statement.
The Turkish Defence Ministry said 35 mortar rounds had been fired, damaging equipment at the post.
There are over a dozen militant groups in this restive Syrian province. The National Front for Liberation, a pro-Turkish alliance, and the Nusra Front* terror group have the biggest presence in the area.
Russia, Turkey and Iran are the guarantors of the ceasefire in Syria which has been ravaged by an eight-year-long conflict.
*Al-Nusra Front or Jabhat al-Nusra, known as Jabhat Fatah al-Sham is a terrorist group banned in Russia