CETINJE, Montenegro, Sept 5 (Reuters) - Montenegro police used teargas against rock-throwing protesters during Sunday"s enthronement of a Serbian Orthodox Church cleric as the nation"s religious leader, with dozens reported injured. The enthronement of Joanikije II at a monastery in the town of Cetinje has stirred divisions within Montenegro over ties with neighbouring Serbia. Montenegro left its union with Serbia in 2006, but its church remained under the Serbian church. Police used gas to disperse hundreds of protesters, some of whom threw rocks, bottles and firecrackers as church figures arrived by helicopter. Some people burned tyres and sat on roads. Montenegro"s deputy police director Dragan Gorovic told state TV that 20 officers were hurt, while a state clinic in Cetinje said around 30 civilians sought help for injuries. Police officers line up during a protest against the enthronement of Bishop Joanikije in Cetinje, Montenegro, September 5, 2021. REUTERS/Stevo Vasiljevic A barricade is set on fire during a protest against the enthronement of Bishop Joanikije in Cetinje, Montenegro, September 5, 2021. REUTERS/Stevo Vasiljevic A demonstrator gestures as a barricade is set on fire during a protest against the enthronement of Bishop Joanikije in Cetinje, Montenegro, September 5, 2021. REUTERS/Stevo Vasiljevic 1/5 A barricade is set on fire during a protest against the enthronement of Bishop Joanikije in Cetinje, Montenegro, September 5, 2021. REUTERS/Stevo Vasiljevic Prime Minister Zdravko Krivokapic described attacks on the police as terrorism. He blamed President Milo Djukanovic"s Democratic Party of Socialists, which ruled for three decades before losing elections last year, for organising protests. Djukanovic, who opposes the enthronement, accused police of excessive force. "Today we witnessed the embarrassment of both the Church and the government," Djukanovic said on TV. The embassies of Germany, Italy, France, Britain, the United States and the European Union condemned violence around the enthronement of Joanikije II, who is known as the Metropolitan of Montenegro and Archbishop of Cetinje. Djukanovic"s adviser Veselin Veljovic was arrested for participating in an attack against police on Sunday, state TV reported.