The explosion damaged several inner-city buses and a trolleybus which stopped at the location. Witnesses said that there were killed and wounded.
The incident happened at 9 a.m. in the Lenin district.
According to the witnesses, the windows broke in the neighboring houses.
As reported by the Russian TASS agency, 13 people were killed.
Images: Oleksandr Kots
It also reported that a driver of a car parked near the stop was killed by a shell hitting the car.