More than 100 Armenian soldiers have been killed in border clashes with Azerbaijan since Monday, Armenian Prime Minister Nikol Pashinyan has said.
Azerbaijan said on Thursday that 71 of its troops had been killed, in fighting which both sides blame on the other.
It is the latest in a series of long-running conflicts fought between the two former Soviet republics over the disputed Nagorno-Karabakh region.
Russia and the US have each called for peace between the two countries.
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