Police have arrested 56 people and initiated criminal proceedings against another 97 following a violent protest in the capital, Tirana, authorities announced.

According to a statement from the Tirana Police, demonstrators allegedly threw stones, hard objects and pyrotechnic devices at police officers and state institutions during the protest.

Authorities also reported damage to government buildings, businesses, banks, road signs and public and private property. Police vehicles were also set on fire during the unrest.

Twenty-four police officers were injured during the clashes and received medical treatment, according to the police statement.

The arrests and criminal proceedings were carried out as part of an investigation led by the prosecutor’s office. Among those arrested are 16 minors aged between 15 and 17, police said.

Authorities have not yet completed their investigation and say they are continuing efforts to identify other individuals allegedly involved in the violence.

The procedural materials have been referred to the prosecution for further action.

The allegations against those arrested and under investigation have not been established in court.