"The armed formations of Karabakh have begun handing over weapons and military equipment under the control of Russian peacekeepers," said Russia, which has around 2,000 peacekeepers in Karabakh.
Russia's defence ministry said so far six armoured vehicles, more than 800 guns, about 5,000 units of ammunition were handed over by the fighters.
Armenians in Karabakh told Reuters that they were essentially besieged in the region, with little food, electricity or fuel - and called on big powers to help them.
Azerbaijan envisages an amnesty for Karabakh Armenian fighters who give up their arms and has said the Armenians can leave the region for Armenia if they want.
Thousands of Karabakh Armenians have massed at the airport seeking the protection of Russian peacekeepers there.
Persons:
Irakli, Cross, Nikol Pashinyan, Antony Blinken, Karapetyan, Svetlana Alaverdyan, Guy Faulconbridge, Gareth Jones
Organizations:
REUTERS, Karabakh, ICRC, Azerbaijan, International Committee, Reuters, Nagorno, United, Thomson
Locations:
Armenia, Karabakh, Tegh, Russia, KORNIDZOR, Nagorno Karabakh, Azerbaijan, Baku, United States, Nagorno, Kusapat, Arajadzor