Armenia's Prime Minister Nikol Pashinyan has announced he will resign in April, amid mounting protests after he signed a Moscow-brokered peace treaty in November that made significant concessions over the disputed region of Nagorno-Karabakh.

Earlier, Pashinyan said he had agreed to hold new elections on June 20 after discussions with Armenia's president and the leaders of its two largest opposition parties.

"Yes, I will resign very soon, in April – not to leave, but for snap elections to take place. Until they happen, I will remain a caretaker prime minister," Pashinyan said.

"The best way out of the current internal political situation is the early parliamentary elections," Pashinyan wrote on Facebook after meeting Gagik Tsarukyan, one of the opposition leaders.

The electoral bloc of Pashinyan won a landslide victory in a snap parliamentary election in December 2018.