For months, Yerevan has accused Baku of stopping traffic through the Lachin corridor -- a short, mountainous road linking Armenia to Armenian-populated settlements in the breakaway region of Nagorno-Karabakh.

Armenian Prime Minister Nikol Pashinyan said at a government meeting Friday that trucks carrying pasta, sugar and baby food had been prevented from entering the region and that Baku had "not given any explanation".

"Armenia, for its part, continues to reaffirm its commitment to the peace agenda and calls on Baku to refrain from steps aimed at nullifying the historic opportunity to establish peace," he said.

Baku and Yerevan, which have fought two wars over the region, have not been able to reach a lasting peace settlement despite mediation efforts by the European Union, United States and Russia.

Armenia and international aid groups have warned that the humanitarian situation in Nagorno-Karabakh is dire and deteriorating, with shortages of food, medicines and energy.