A "firearms incident" near the British Parliament in London is being investigated by UK police.
At approximately 2:40 pm, London's Metropolitan Police said they were called to reports of an incident near Westminster Bridge.
Police said on Twitter, it is being treated as a firearms incident and police are on the scene.
The incident occurred as parliament was in session. Proceedings in the House of Commons were suspended.
Dozens of MPs remain in the House.
Transport for London tells CNN, the London Underground station of Westminster is closed because of the incident.