Vladimir Putin has said it would be “suicidal” for the Armenian government to back out of a Russian-brokered ceasefire in the war in Nagorno-Karabakh, as opposition forces in Yerevan protest against the week-old truce and call for the resignation of the prime minister, Nikol Pashinyan.

In a Russian state television interview about the deal aired on Tuesday evening, Putin was asked about a new government potentially coming to power reneging on the deal. “That would be a huge mistake,” he said.

The deal, which gave Azerbaijan significant territorial concessions after launching a bloody six-week war, was seen as a capitulation in Armenia and sparked protests against Pashinyan’s government. The country’s president has demanded snap elections and his foreign minister resigned this week in a high-level departure tied to the controversial deal.

Armenian security services last week also said they had prevented an assassination plot against Pashinyan involving an opposition politician and a war veteran.

“A country that is at war or in danger of resuming hostilities, as it has always been in past years, still cannot afford to behave in such a way, including in the sphere of organising power, as to split society from within. I think this is absolutely unacceptable, counterproductive and extremely dangerous,” Putin said.