A London landmark is in lockdown after reports that a person "fell from a height".
Officers received reports about the incident at Heron Tower in Bishopsgate at about 2pm this afternoon, with police still at the scene.
Ambulance crews and an air ambulance are also in attendance.
City of London Police have urged the public to stay away from the area while a cordon remains in place.
"Officers from the City of London Police were called to reports of a person falling from height on Houndsditch," Chief Superintendent Rob Atkin said.
“Officers from the City of London Police were called to reports of a person falling from height on Houndsditch. Police arrived on scene at around 2pm.
“Cordons are currently in place and the public are urged to avoid the area if possible while emergency services remain in attendance.”
"Police arrived on scene at around 2pm.
"Cordons are currently in place & the public are urged to avoid the area if possible while emergency services remain in attendance."
The Salesforce Tower - previously known as Heron Tower - is a commercial skyscraper in the capital.
It stands at 230 metres tall, which includes its 28-metre mast, making it the second tallest building in the City of London financial district.
The height at which the person fell has not yet been confirmed by police.
Ambulance crews, medics in two fast response cars and a clinical team leader, as well as London's Air Ambulance service, were also dispatched.
A London Ambulance Service spokesperson said: “We were called at 2.02pm today to reports of an incident on Bishopsgate, City of London.
“We sent a number of resources to the scene, including an ambulance crew, medics in two fast response cars and a clinical team leader. We also dispatched London’s Air Ambulance.”