A man holding a Palestinian flag has been seen climbing up the Big Ben as police have shut down Westminster Bridge.
Social media videos show a barefoot man stood on a ledge of the Elizabeth Tower holding a Palestinian flag.
A Met Police spokesperson said: "At 7.24am on Saturday March 8 officers were alerted to a man climbing up the Elizabeth Tower at the Houses of Parliament.
"Officers are at the scene working to bring the incident to a safe conclusion. They are being assisted by the London Fire Brigade and the London Ambulance Service."
Videos show a barefoot man stood on a ledge of the Elizabeth Tower holding a Palestinian flag
GB News
Police have confirmed that Bridge Street has been closed to allow the emergency services to deal with the incident.