Seven Azerbaijani troops have been killed in border clashes with Armenia near the disputed Nagorno-Karabakh region, officials in Baku said this morning.

Yesterday, Armenian and Azerbaijani forces engaged in their worst clashes since going to war last year over the long-disputed Nagorno-Karabakh region.

The six-week conflict, which claimed the lives of more than 6,500 people, ended last November in a Russia-mediated deal that saw Armenia cede swathes of territory it had controlled for decades.

The clashes yesterday along the Caucasus neighbours' shared border sparked fears of another flare-up in their territorial dispute.

"Seven servicemen died and ten more were wounded in the clashes provoked Tuesday by Armenia," Baku's defence ministry said, adding that the situation at the border "stabilised on Tuesday evening".

Armenia's defence ministry said one Armenian soldier was killed, 13 were captured by Azerbaijani forces and 24 more servicemen were missing.

It said: "The situation at the border's eastern sector was relatively calm and a ceasefire agreement was being respected."

Armenia's Prime Minister Nikol Pashinyan accused Azerbaijan of "targeting Armenia's statehood, sovereignty, and independence".

Baku said Armenia was responsible for a "large-scale military provocation".

Armenia appealed to ally Russia for military support under the Collective Security Treaty Organisation pact, which obliges Russia to protect it in the event of a foreign invasion.

A ceasefire was reached yesterday evening following mediation by Russia's Defence Minister Sergei Shoigu.

The EU, France, the UN, and the US have called on both sides to de-escalate tension.

Ethnic Armenian separatists in Nagorno-Karabakh broke away from Azerbaijan as the Soviet Union collapsed in 1991, and an ensuing conflict claimed around 30,000 lives.