The Kremlin strongly rejected on Tuesday accusations by Turkey that Russia committed a war crime in Syria after missile attacks killed scores of people a day earlier, hitting several medical facilities and schools.
"We categorically do not accept such statements, the more so as every time those making these statements are unable to prove their unfounded accusations in any way," President Vladimir Putin's spokesman Dmitry Peskov told reporters during a conference call.
Turkey on Monday accused Russia of an "obvious war crime" after missile attacks in northern Syria killed scores of people, and warned Kurdish militia fighters there they would face the "harshest reaction" if they tried to capture a town near the Turkish border.
An offensive supported by Russian bombing and Iranian-backed Shi'ite militias has brought the Syrian army to within 25 km (15 miles) of Turkey's frontier. The Kurdish YPG militia - which Turkey regards as a hostile insurgent force - has exploited the situation, seizing ground from Syrian rebels to extend its presence along the border.
Almost 50 civilians were killed when missiles hit at least five medical facilities and two schools in rebel-held areas of Syria on Monday, according to the United Nations, which called the attacks a blatant violation of international law.
At least 14 were killed in the northern town of Azaz, the last rebel stronghold before the border with Turkey, when missiles hit a children's hospital and a school sheltering refugees, a medic and two residents said. Missiles also hit a hospital in the town of Marat Numan in the province of Idlib, south of Aleppo.