Smoke Engulfs London Underground Train, Evacuation Follows (PHOTOS, VIDEO)

The station has been closed while emergency services are responding to the report, the city's transport authority said. Police said they had been called to the station after reports of a fire alert.

As the news emerged, multiple passengers shared photos and videos from the Oxford Circus underground station.

British firefighters said they were investigating reports of smoke at Oxford Circus Tube station, which is located in the center of London's main shopping district.

"We have been called. We are investigating reports of a fire," a spokeswoman for London Fire Brigade said, as quoted by Reuters. "We are investigating and we are at the scene."

The evacuation forced local shops to lower the shutters.

The incident is not being treated as suspicious, British Transport Police announced in a tweet.

There have been no reports of injuries so far.

This is the second major disruption London has faced in two days. On Thursday, a double-decker bus crashed into a shop on busy Lavender Street in south London, leaving several people injured.