At least 49 Armenian troops killed in Azerbaijan border clashes: PM
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He said the intensity of fighting had subsided following heavy shelling from Azerbaijan that began overnight.
Earlier on Tuesday Armenia appealed to world leaders for help, saying that Azerbaijani forces were trying to advance onto its territory.
The neighbours fought two wars -- in the 1990s and in 2020 -- over Nagorno-Karabakh, an Armenian-populated enclave of Azerbaijan.
Six weeks of fighting in the autumn of 2020 claimed more than 6,500 lives and ended with a Russian-brokered ceasefire.
Under the deal, Armenia ceded swathes of territory it had controlled for decades and Moscow deployed about 2,000 Russian peacekeepers to oversee the fragile truce.