The Syrian Observatory for Human Rights said on Friday that Russian warplanes continued their air strikes after midnight on Friday to the countryside of Idlib and Hama in Syria.
The British-based observatory has documented the deaths of four people in Kaldi in addition to injuries.
He added that the Russian aircraft renewed its bombing on Friday morning targeting the village of Shia two air raids.
The United Nations on Thursday expressed concern over the sight of civilians as violence continued in north-west and central Syria for a third consecutive day.
"We are deeply concerned at the recent upsurge in violence in north-west Syria, including in areas where it is believed," said David Swanson, regional spokesman for the UN Office for the Coordination of Humanitarian Affairs (OCHA) based in Amman, Jordan. In the demilitarized zone or near it, resulting in further displacement and the destruction of at least three health facilities in recent days. "
The Syrian Observatory for Human Rights, based in Britain, has announced that Syrian and Russian government warplanes launched at least 160 air strikes on areas in the countryside around Idlib and Hama on Thursday.
The observatory said that among the dead in Idlib is a family of four, including two children.
Swanson said the widespread escalation of hostilities in the Idlib and Hama regions should be avoided at all costs.
"Failure to do so will lead to human suffering on an unprecedented scale in conflict," he warned.
According to Swanson, at least seven people were killed in 48 hours in southern Idlib, while two were killed in Hama province. Dozens were also injured in the governorates of Idlib, Hama and Aleppo. An estimated 323,000 people have been displaced in north and northwest Syria since September, mostly in Idlib and Aleppo, he said.
In September, President Putin and Erdogan agreed at the end of a meeting in Sochi to establish a demilitarized zone in Idlib province.