Armenia's government faces new woes after losing Nagorno-Karabakh to Azerbaijan forces as citizens vented their ire on their leader.

Anti-government demonstration erupted in Yerevan and the protest on the mishandling of the Nagorno-Karabakh crisis continued Friday.

Opposition parties are taking part in the rallies, accusing Prime Minister Nikol Pashinyan of too many concessions to Baku and demanding his resignation.

Protesters were blocking streets across the Armenian capital to prevent Pashinyan's cabinet meeting as opposition leaders announced plans to impeach him in parliament.

On Wednesday and Thursday, dozens of protesters were detained outside Pashinyan's offices for throwing bottles and stones, and attempting to break into the building. Opposition politician Andranik Tevanyan was among those detained.

Riot police have used stun grenades against the demonstrators.

Pashinyan appealed for calm in a televised address.

On Tuesday, Azerbaijan launched a military operation to retake the Armenian-populated enclave of Nagorno-Karabakh which had been under Armenian separatists' control since the 1990s war between the Caucasus arch foes.

Armenian separatists agreed to lay down their arms on Wednesday as part of a Russian-brokered ceasefire plan that halted Azerbaijan's 24-hour offensive to retake land at the center of decades of conflict.

A ceasefire was agreed upon by the two sides with Russian peacekeepers as monitors, while Azerbaijan and the separatists held their first direct peace talks Thursday.

WITH AFP