According to the Bulgarian National Radio, several hundred protesters blocked the Knyaz Aleksandar Dondukov Boulevard in front of the parliament and threw eggs at the building.
The protesters were calling on the government to resign, and law enforcement officers pushed them away from the parliament building.
Bulgaria has been rocked by month-long protests against the centre-right government of Prime Minister Boyko Borissov. President Rumen Radev has called on Borissov to step down after accusing his administration of corruption.
