Russia has supported Syria's ruling regime, a longtime ally, through a bombing campaign against militant groups in the country for the past two years.
Forces loyal to Syrian President Bashar al-Assad broke through the three-year siege of Deir al-Zour last week and have been continuing efforts to liberate the eastern Syrian city, the statement added.
Most of the province of Deir al-Zour has been controlled by Islamic State since 2014.
At least 28 civilians were killed in Russian and US-led coalition airstrikes earlier Tuesday targeting Islamic State in eastern Syria, according to a monitoring group.
The head of the Syrian Observatory for Human Rights, Rami Abdel Rahman, said Russian airstrikes killed 16 civilians at a refugee camp near Deir al-Zour, on the western bank of the Euphrates River.
Five children were among those killed, bringing the civilian death toll to 69 in Russian airstrikes since Sunday, the watchdog said.
The US-led coalition killed 12 people on Tuesday in strikes targeting other areas to the east of Deir al-Zour.
A Syrian Kurd-led alliance supported by the US started a separate offensive over the weekend against Islamic State in the province.
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Forces loyal to Syrian President Bashar al-Assad broke through the three-year siege of Deir al-Zour last week and have been continuing efforts to liberate the eastern Syrian city, the statement added.
Most of the province of Deir al-Zour has been controlled by Islamic State since 2014.
At least 28 civilians were killed in Russian and US-led coalition airstrikes earlier Tuesday targeting Islamic State in eastern Syria, according to a monitoring group.
The head of the Syrian Observatory for Human Rights, Rami Abdel Rahman, said Russian airstrikes killed 16 civilians at a refugee camp near Deir al-Zour, on the western bank of the Euphrates River.
Five children were among those killed, bringing the civilian death toll to 69 in Russian airstrikes since Sunday, the watchdog said.
The US-led coalition killed 12 people on Tuesday in strikes targeting other areas to the east of Deir al-Zour.
A Syrian Kurd-led alliance supported by the US started a separate offensive over the weekend against Islamic State in the province.
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