Russia accused of killing 10 civilians in Syria airstrike
"The Russian aviation did not carry out any combat tasks in this area of Syria," the Russian foreign ministry said in a statement, calling foreign media reports a "provocation."
The Syrian Observatory for Human Rights said that Russian air strikes hit near a bakery and a medical clinic in Syria's rebel-held Idlib region early on Thursday.
A dust-covered doctor ran out of the Al-Shami clinic screaming following the attack, which partially damaged the facility's walls, an AFP correspondent reported.
Nearby, three entire buildings had collapsed.
The wailing of women and children rang out as rescue workers searched for corpses beneath the rubble, the correspondent added.
The latest deaths brings the total number of civilians killed by Russian air strikes in Idlib over the past 24 hours to 21, the Observatory said.
Earlier this month, Russia denied launching any combat operations in the Idlib region since a ceasefire it agreed with rebel supporter Turkey went into effect on January 12.
But the truce has since become a dead letter and the number of reported Russian raids has risen sharply.
Thousands of Russian troops are deployed across Syria in support of the army, while a contingent of Russian private security personnel also operates on the ground.
Moscow's military intervention in 2015, four years into the Syrian conflict, helped keep President Bashar al-Assad in power and started a long, bloody reconquest of territory lost to rebels in the early stages of the war.
The fierce bombardment coincides with a ground push by government forces in the south of Idlib province, where they captured the strategic highway town of Maaret al-Numan on Wednesday.
They are now pushing on towards the town of Saraqib, whose residents have mostly fled in recent days in the face of heavy bombardment.
Read more: The story of Idlib's 'ceasefires' is the story of Syria's war
Both towns lie on the key M5 highway connecting the capital Damascus to second city Aleppo.
The road has been in the sights of the government for some time as it seeks to revive a moribund economy ravaged by almost nine years of war.
Idlib province is home to 3.5 million people, some of them displaced by the regime from other formerly rebel-held areas over Syria.
Roughly 358,000 people have been displaced from southern Idlib province in recent weeks as a result of the regime advance, according to the United Nations.