A bus crashed on Tsarigradsko Shose Boulevard in Sofia in the direction of "Orlov Most". The vehicle hit the dividing guardrail and tore it, bTV reported.
It is also blocking the lane for traffic exiting Sofia. There are serious traffic difficulties.
Police and emergency services teams have been sent to the scene to clear the road and clarify the causes of the accident.
Four people were slightly injured, they will be sent for examinations to ISUL and "Pirogov".