According to the agency, the incident took place on Dzerzhinsky Avenue, when riot policemen ran out of the transport vehicles to the crowd.
The protesters began to run away, and people from the common balconies of nearby high-rises shouted to them where to hide and threw bottles at the security forces.
In response, pump-action guns were fired in their direction several times.
Earlier, the Ministry of Internal Affairs of Belarus stated that in Brest, the police opened fire to kill the attackers.