Russia has denied that its warplanes carried out air strikes in a village in eastern Syria on Sunday, which activists say killed dozens of civilians .
The Syrian Observatory for Human Rights said that 53 people died in al-Shafah, while the website DeirEzzor24 recorded a balance of 25.
Both said that the Russian aircraft, which support the pro-government Syrian fighting forces against the so-called Islamic State (IS) in the area, they were behind the attack.
But on Monday the defense ministry of Russia insisted that it did not bomb al-Shafah.
Strikes by the Russian Aerospace Forces in Syria point to areas outside population centers and only to facilities of international terrorist groups, "a statement said, according to Russian news agencies.
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"Information about such facilities is verified before the strikes are carried out and verified in real time through several channels, both from the ground as by unmanned aerial recording devices. "
"The reports of the Syrian Observatory of Human Rights, which is based in Great Britain, on the alleged attacks of Russian Air Force aircraft in the village of Shafah are another forgery."
A previous statement had announced that six Russian long-range Tu-22M3 bombers attacked IS command posts and militant positions in the province of Deir al-Zour on Sunday.
DeirEzzor24, a news website run by activists, reported that Sunday's air strikes attacked a residential complex where several displaced families stayed.
Most of the 25 people killed were women and children, he said, adding that the death toll could rise because many victims were still trapped under collapsed buildings.