A BBC cameraman allegedly had his leg run over by a car carrying Jeremy Corbyn.
Giles Wooltorton was seen being treated by medics after the incident as the Labour leader arrived for his party's General Election manifesto signing.
BBC political editor Laura Kuenssberg was seen crouched beside the cameraman as he explained what happened during the incident.
Channel 4 journalist Matt Spencer tweeted a video of Mr Wooltorton receiving treatment, writing: "This BBC cameraman has just had his leg ran over by the car Jeremy Corbyn arrived in at Labour's manifesto signing.
"Jeremy Corbyn was in the car as the tyre ran over this man's foot. He's receiving medical treatment - Corbyn's gone inside.
"BBC Cameraman Giles is in good spirits, but pain. An ambulance is just arriving."
BBC cameraman 'run over by car carrying Jeremy Corbyn' - In pictures
Senior Labour figures are attending a "Clause V meeting" in Savoy Place off the Strand in central London today in order to finalise the party's manifesto after a draft of the document was leaked to the press.
The incident came hours after Mr Corbyn pulled out of the planned launch of Labour's first General Election campaign poster in the aftermath of the manifesto leak.
The Labour leader was due to unveil the poster on London’s South Bank on Thursday morning.
Labour’s election co-ordinators Andrew Gwynne and Ian Lavery attended the launch instead.
Details of the draft manifesto were published on Wednesday evening.
The 43-page document sets out plans to take the energy industry, railways, buses and the Royal Mail back under public control.
It commits Labour to scrapping tuition fees, boosting workers' rights and reversing a series of benefits cuts - including the so-called bedroom tax.
Labour is expected to finalise its manifesto at the Clause V meeting on Thursday, but the extraordinary leak of the policy document saw details released a week ahead of its planned publication in a blow to the party's campaign strategy.
Mr Gwynne, Labour's national campaigns co-ordinator, denied the document was the party's manifesto during an appearance on Good Morning Britain.
Read More
He said: "The point is today the whole of the shadow cabinet, the executive committee and other stakeholders are meeting to go through what will become our manifesto.
"This document that has appeared in the newspapers today isn't a manifesto. It's a draft of policy ideas that have been collated from various members of the shadow cabinet, their teams and other stakeholders."
The Evening Standard has contacted the Labour Party and the London Ambulance Service for comment.
