MOSCOW (Sputnik) — Some 30,000 people have gathered for the annual May Day demonstration in the city, according to the police.
"Three colleges of ours were injured by firecrackers," the police said in a Twitter post.
The demonstrators, have been traditionally joined by members of the left parties and trade unions, as well as the Afghan and Syrian refugees' representatives in Germany. They were holding red flags and balloons and posters calling for social justice.
Over 6,000 law enforcement officers were deployed in the city to provide security during the event.
