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The antheral was seen climbing the Elizabeth Tower, which houses Big Ben
Emergency services person been called to the Palace of Westminster, wherever a antheral has scaled 1 of the buildings carrying a Palestinian flag.
Video shared connected societal media shows a barefoot antheral stood connected a ledge respective metres up Elizabeth Tower, which houses Big Ben.
The Met Police said officers were called to the operation astatine 07:24 GMT connected Saturday.
"Officers are astatine the country moving to bring the incidental to a harmless conclusion," the unit said.
Bridge Street, which is astatine the northbound extremity of Westminster Bridge, is closed to let the exigency services to woody with the incident, constabulary confirmed.
A spokesperson for London Fire Brigade (LFB) said they were responding to the incidental alongside the police.
Crews from Lambeth, Chelsea, Soho and Islington occurrence stations person been deployed, LFB said.