"An unknown home-made explosive device has gone off at a public transport stop injuring three people," police sources told TASS.
Reports of the blast were confirmed by Moscow police spokesman Andrey Galiakberov, who said that authorities are now looking into the incident.
Emergency crews are helping the injured on Pokrovka street, which reaches out towards the city's northeast.
At least 3 injured after explosion at bus stop in Moscow pic.twitter.com/gsjCVYc2tu— Russian Market (@russian_market) December 7, 2015
The home-made bomb was thrown at a group of people who had been standing at the bus stop, sources told RIA Novosti.
Three women sustained injuries in the explosion, Interfax reported.
"Two women were taken to hospital with shrapnel wounds while the third victim suffered minor cuts and was given medical assistance on the spot," sources told TASS, adding that the injuries of the pair in hospital are not life-threatening.
Police have launched an investigation into a case of hooliganism.
Comment: Police aren't overreacting here, calling it a case of 'hooliganism'. Compare that to how this would go down in the States. It would immediately be called an act of terrorism, before any investigation.