Turkey's President Recep Tayyip Erdoğan spoke with his Russian counterpart Vladimir Putin by phone on Thursday.
Russian airstrikes accidentally killed three Turkish soldiers and wounded 11 others during an operation against Daesh in northern Syria on Thursday morning, Turkey's military said in a statement.
Russian President Vladimir Putin called Turkish counterpart Tayyip Erdogan and expressed sorrow and condolences for the accidental killing, the military added. Both parties are carrying out investigations into the incident, it said.
The two heads of state agreed to increase military coordination in Syria against Daesh, the Kremlin said.
Turkish-backed Syrian opposition fighters resumed a major offensive inside the city on Thursday, a day after they broke through Daesh defenses in its remaining stronghold in Aleppo province.
The Kremlin said Putin and Erdoğan had also agreed to actively try to advance the Astana and Geneva peace talks on Syria and had discussed preparations for a meeting of the two countries in Russia in March.
