Armenian Prime Minister Nikol Pashinyan resigned on Sunday while staying on in a caretaker capacity, setting the stage for a June 20 ­parliamentary election aimed at defusing a protracted political crisis.

Pashinyan has faced calls to stand down since his ­November signing of a Russian-brokered peace agreement with Azerbaijan that ended a war between the two arch-foes for control of the disputed Nagorno-Karabakh region.

"I am resigning from my post as prime minister today" to hold the snap vote on June 20, he said in an announcement broadcast on his Facebook page.

"I am returning to the citizens of Armenia the power they gave me, so that they decide the government's fate through free and fair elections," he said.

After Pashinyan announced his resignation, all members of his cabinet handed in their own resignations, as required by Armenian law.

Pashinyan said he would continue to fulfill his duties as head of the interim government before the vote, and that he would stand as a candidate for prime minister.

The tiny Caucasus nation has been embroiled in a political crisis in the wake of its humiliating defeat at the hands of Azerbaijan's technologically superior army.

The defeat spurred mass protests in the ex-Soviet republic on the borders of Turkey and Iran, which came to a head in February after Pashinyan accused Armenia's top ­military officer of staging a coup.

To defuse the crisis, Pashinyan announced in March the snap election, which was welcomed by prominent members of the opposition.