Opposition supporters gathered on Sunday in the Armenian capital of Yerevan to protest the government's concessions to Azerbaijan over the Nagorno-Karabakh region.

Parties from the opposition have accused the Armenian Prime Minister, Nikol Pashinyan, of planning to give away all of Karabakh to Azerbaijan. He had told Armenian MPs last month that the "international community calls on Armenia to scale down demands on Karabakh." 

To protest Pashinyan's plans, thousands of opposition supporters gathered in downtown Yerevan, calling on Pashinyan to resign and holding placards with "Karabakh" and "Armenia without Turks" - in reference to Turkic-speaking Azerbaijanis - written on them.

The parliament's Vice-Speaker and opposition leader, Ishkan Sagatelyan accused Pashinyan of betraying the people's trust, calling on him to step down and announcing that the protest movement will lead to the overthrow of the government. 

"Any political status of Karabakh within Azerbaijan is unacceptable to us," Sagatelyan said.

Late last month, Armenian Foreign Minister Ararat Mirzoyan and his Azerbaijani counterpart, Jehyun Bayramov, held a phone call regarding the Nagorno-Karabakh conflict, the Foreign Ministry in Yerevan said Monday.

The two parties agreed on the structure of the commission that would handle the delimitation of the international borders between the two countries to settle a conflict that has been ongoing for decades, Yerevan added.

"The ministers exchanged views on the implementation of agreements reached at the level of the heads of state. The parties agreed on the structure of the commission on delimitation and border security," the ministry revealed.