The Russian Air Force, which is backing Syrian government forces, carried out the strikes with Su-24 bombers, the Russian Center for the Reconciliation of Warring Sides said in a statement the same day.
In turn, Turkey, a NATO member which is allied with militants opposed to President al-Assad’s government, retaliated.
The Turkish Defense Ministry claimed that as many as 50 Syrian government soldiers were killed in response, and that two armored personnel carriers, and other equipment were destroyed.
The clashes in Idlib, the last region held by rebels resisting Syrian-government forces, come a day after Turkish President Recep Tayyip Erdogan warned of an imminent Turkish offensive in the area.
Backed by Russian air power, Syrian forces are trying to capture the region.
Thirteen Turkish soldiers were killed in Syrian attacks earlier this month, prompting Erdogan to warn of future action should another Turkish soldier be harmed.