The broadcaster that first reported the news hasn’t identified the victims of the attack, but other media outlets stated later that the local police chief, Valery Osipyan, is being held hostage.
Troops have been dispatched to the building, and the head of the country’s security forces, Vladimir Gasparyan, is on the scene as well.
The attack began when an armed group in trucks rammed through the gates of the police headquarters and took control of the building.
The attack is thought to have been launched to demand the release of Armenian opposition figure Jirair Sefilyan, who was detained on June 20 after authorities allegedly uncovered a plot to seize several buildings and telecommunication facilities in Yerevan.
Armenia’s police are to make an official statement shortly, Russia Today reported.