Armenia's ambassador to Russia said on Monday that Turkey had sent around 4,000 fighters from northern Syria to Azerbaijan amid fighting over the breakaway region of Nagorno-Karabakh, the Interfax news agency reported.
However, an aide to Azerbaijan's President Ilham Aliyev denied the claims that were made.
For all the latest headlines follow our Google News channel online or via the app.
“Rumors of militants from Syria allegedly being redeployed to Azerbaijan is another provocation by the Armenian side and complete nonsense,” said the aide, Khikmet Gadzhiev.
The ambassador said the fighters were taking part in fighting in Nagorno-Karabakh, a region inside Azerbaijan that is run by ethnic Armenians, the RIA news agency reported.
Armenian and Azeri forces exchanged fierce fire for a second day on Monday over the region, with both sides accusing each other of using heavy artillery.
Turkey is a close ally of Azerbaijan.