Widespread protests have gripped Iran amid anger over the Islamic Republic’s handling of the destruction of a Ukrainian airliner with the loss of 176 lives.

Iran’s powerful revolutionary guards first denied but later admitted responsibility in the face of mounting evidence and pressure from counties such as Canada, which had a large number of citizens on the doomed flight.

The US has shared intelligence and satellite images of the accident with other countries, forcing Iran to retract earlier adamant denials.

The aircraft was shot down last Wednesday following Iranian missile attacks on Iraqi military bases housing US troops in retaliation for the killing of top Major General Qassem Soleimani.

“They are lying that our enemy is America, our enemy is right here,” one group of protesters chanted outside a university in Tehran, according to video posted on Twitter. Protesters also called for the resignation of Supreme Leader Ayatollah Ali Khamenei.

Other posts showed demonstrators on Sunday outside a second university and a group of protesters marching to Tehran’s Azadi (Freedom) Square, as well as protests in other cities.

The latest wave of unrest adds to mounting pressure on the Iranian authorities, who are struggling to keep the crippled economy afloat under stringent US sanctions.

Protests over a hike in fuel prices turned political in October, sparking the bloodiest crackdown in the 40-year history of the Islamic Republic.