Traffic was jammed by a bus and tram colliding in the roundabout at Tallinn's Viru Square shortly after 14:00 EEST on Friday.
The collision occurred on the Mere puiestee side of the roundabout.
No injuries have been reported, a spokesperson for the Police and Border Guard Board (PPA) said.
Tram transport ground to a halt in the area as all four tram lines pass through the roundabout. Other vehicular traffic in and around the intersection was disrupted as a result.
According to the police, traffic was restored shortly before 15:00.
Editor: Aili Vahtla