Azerbaijan has said its military measures in Nagorno-Karabakh are continuing for a second day, having launched what it calls "anti-terror" operations in the enclave.
It says it will not stop until Karabakh's ethnic Armenians surrender.
Tensions in the South Caucasus have been high for months around the breakaway region, recognised internationally as part of Azerbaijan.
Azerbaijan and Armenia last went to war three years ago.
In a statement on Wednesday morning, Azerbaijan's defence ministry said military equipment belonging to the Armenian armed forces had been "neutralised", including military vehicles, artillery and anti-aircraft missile installations.
Nagorno-Karabakh authorities say 27 people have been killed, including two civilians, and many more wounded since the offensive began.
Baku has said it is prepared for talks, but insists "illegal Armenian military formations must raise the white flag" and dissolve their "illegal regime".
Tensions have been simmering around the region for months, after Azerbaijani troops blockaded the Lachin corridor in December, cutting off the only road connecting Nagorno-Karabakh to Armenia and preventing the import of food to its roughly 120,000 inhabitants.
Russian peacekeepers, who deployed to Nagorno-Karabakh under the terms of the 2020 ceasefire, have been tasked with preventing a fresh conflict breaking out. But Moscow has been accused of being unable or unwilling to intervene to protect Armenia, its long-term ally, in the face of continuing aggression from Azerbaijan.
Karabakh authorities said they have asked for immediate talks with Azerbaijan, amid continued shelling of the region.
U.S. Secretary of State Antony Blinken urged Azerbaijani President Ilham Aliyev to "immediately cease hostilities" and told Pashinyan that Washington supported Armenia's sovereignty and territorial integrity.
Russia - distracted by the war in Ukraine - called for calm but some Russian officials scolded Armenia for flirting with the West and said this could lead to serious problems.
"This is a big war - Azerbaijan has started a full operation," Ruben Vardanyan, former head of the ethnic Armenian administration in Karabakh, told Reuters from its capital, which is known by Armenians as Stepanakert and by Azeris as Khankendi.
Armenia's government has also voiced support for joining the International Criminal Court — a body that currently has a warrant out for the arrest of Russian President Vladimir Putin over his actions in Ukraine.
Separately, Pashinyan has recently called Armenia's traditional reliance on Russia for its security "a strategic mistake."
"Armenia's security architecture was 99.999% linked to Russia, including when it came to the procurement of arms and ammunition," he said in an interview with the Italian newspaper La Repubblica earlier this month.
Russia doesn’t appear eager to step into the new conflict. Commenting on Armenia’s demand for Russian peacekepeers to end the fighting, Russian Foreign Ministry spokeswoman Maria Zakharova said, “What about Yerevan’s recognizing Nagorno-Karabakh as part of Azerbaijan?”
And former Russian President Dmitry Medvedev, resentful of Armenia’s distancing itself from Russia, said of Armenian Prime Minister Nikol Pashinyan, “Guess what fate awaits him.”
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