Baku: Azerbaijan on Friday said that it had lost eight soldiers in three days of clashes with arch-foe Armenia on the border and near the disputed Nagorny Karabakh region in a dramatic spike in tensions in the long-simmering territorial conflict.
International mediators, who have for years sought to help the two countries reach a breakthrough, expressed concern over the violence.
Azerbaijan`s Defence Ministry said Armenian troops had ramped up their activity in the past few days and attacked Azeri positions.
"Reconnaissance and sabotage groups of the Armenian armed forces attempted to break through the line of contact between the troops along the entire front line," the ministry said, adding that the Armenian troops had been repelled.
"As a result of clashes over the past three days, eight Azeri troops have died," it said.
Azerbaijan and Armenia have been locked in a protracted conflict over the Nagorny Karabakh region with occasional skirmishes along the front.
The latest clashes however represent a surge in tensions between the two countries, with one prominent Azeri military expert saying Baku has not suffered such losses in a single bout of hostilities since 1994.
Azerbaijan said Armenia had also suffered losses, although it did not provide any details.
In Armenia, a high-ranking Defence Ministry official presented a different version of the events.
Speaking to a news agency, he said that Azerbaijani "sabotage groups" had tried to break into Armenia and that the Azeris had lost 14 troops in the latest skirmish.
"Azerbaijani subversive groups were ambushed. As a result, they have 14 dead and lots of wounded. There are no casualties or wounded on the Armenian side," the official said.
Officials in Nagorny Karabakh for their part had said that two Armenian troops died in an attack by Azerbaijani forces yesterday.
Armenian-backed separatists seized Nagorny Karabakh from Azerbaijan in a 1990s war that killed 30,000 people.
Despite years of negotiations since a 1994 ceasefire, the two sides have yet to sign a peace deal.
Azerbaijan has threatened to take back the disputed region by force if negotiations do not yield results, while Armenia has vowed to retaliate against any military action.