David Cameron has been heckled by an apparent SNP supporter during a speech in London.
The man with a Scottish accent shouted "come on SNP" as the Prime Minister addressed supporters at a garden centre in Twickenham.
According to reports, journalists at the scene who witnessed the full event said the man had claimed the Prime Minister was "racist against Scots".
A photo of the heckler posted online appeared to show the man being held back by security.
The incident comes as Mr Cameron claims that Labour-SNP alliance will cause chaos at Westminster.
Mr Cameron insisted there was "momentum" behind his party's campaign but his speech to cheering activists in south-west London was marred by the heckler who was ejected from the venue.
Party faithful booed as Mr Cameron described the possible prospect of "chaos" with Labour leader Ed Miliband as prime minister "backed by the SNP".
His remarks followed London mayor Boris Johnson branding a Labour government supported by the SNP as "Ajockalypse Now".
Mr Johnson told the Sunday Times: "People are looking at Ed Miliband and they're getting bad visuals of him popping out of Alex Salmond's sporran like a baffled baby kangaroo.
"Everybody loves the Scots. Nobody thinks this is going to be some tartan tyranny with everybody forced to wear kilts. But it would be a chaotic and tense arrangement."
During today's event, the lone male voice shouted: "I'm feeling racism from you guys in your party."
Footage broadcast by BBC News showed the heckler being removed from the garden centre.
He could be heard saying: "Come on SNP. Is there going to be an ajockalypse? I'm from Scotland - the racism I'm getting because of these people and Boris. It's not fair. Come on SNP."
He also called for a fairer society, adding: "This isn't fairer. This is democracy - I'm being pushed out."
Mr Cameron continued with his speech, and received more cheers as he urged those present to "get out and vote Conservative".
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