Police fired tear gas and stun grenades to disperse a rally in downtown Cetinje on Sunday morning, state broadcaster RTCG reported.
Protesters wanted to prevent the inauguration of Metropolitan Joanikije in a local monastery.
Social Democratic Party (SDP) General Secretary Ivan Vujovic said the party’s honorary leader and former longtime head of parliament, Ranko Krivokapic, who was present at the rally, was slightly injured by a police stun grenade.
The office of Prime Minister Zdravko Krivokapic told the Vijesti newspaper that a Molotov cocktail was hurled at the officers. The Cetinje mayor’s office denied this, however.
On Saturday, protesters used tires, concrete blocks and rocks to block traffic on roads to Cetinje from Podgorica, the country’s capital and largest city, and Budva. On Sunday, they set the barricade on fire as police tried to negotiate them to leave.