Metropolitan police have shut down the whole area, putting traffic in gridlock as various places shut up shop.
The London Eye is believed to have been closed in light of events.
One Twitter user said: “London Eye has been closed – terrified children crying uncontrollably being comforted by teachers.”
People stuck on the London Eye
A spokeswoman for the London Eye declined to comment saying they were unable to comment on the phone.
It according to reports people are stuck on the popular attraction.
The police have enforced a wide cordon around the area and have told people to avoid – Parliament Square, Whitehall, Westminster Bridge, Lambeth Bridge, Victoria Street up to the junction with Broadway and the Victoria Embankment up to Embankment tube station.
More to follow.
Police have closed off Westmister
London Eye (archive picture)
Get Quotes on Home Insurance
People trapped in a London Eye pod