Azerbaijan says at least five Armenian soldiers have been killed in a clash with Azerbaijani forces near the breakaway Nagorno-Karabakh region.
The Defense Ministry said on February 12 that the incident had taken place overnight.
De-facto officials of Nagorno-Karabakh rejected the statement, saying Azerbaijani snipers had shot a shepherd dead on February 11-12 and shelled the breakaway region's positions with grenade launchers and mortars.
Azerbaijan denied that its forces had killed the civilian.
Baku and Yerevan have been locked in conflict over Azerbaijan's breakaway region of Nagorno-Karabakh for over two decades.
Armenia-backed separatists seized the mainly ethnic Armenian-populated region during a war in the early 1990s that killed some 30,000 people.
International diplomatic efforts to settle the conflict have brought little progress.