Shadow Europe minister Pat Glass has apologised for describing a voter live on radio as a "horrible racist" while campaigning on the EU referendum.
She made the comments at the end of an interview in Sawley, Derbyshire, saying: "The very first person I come to is a horrible racist.
"I'm never coming back to wherever this is."
It is understood the man she was referring had referred to a Polish family in the area who he believed were living on benefits, describing them as "spongers".
Ms Glass has since said the comments were "inappropriate" and apologised to the people of Sawley "for any offence I have caused".
The remarks, which have drawn comparison with Gordon Brown's infamous "bigoted woman" comment following his meeting with Gillian Duffy during the 2010 election, came at the end of an interview with BBC Radio Derby.
North West Durham MP Ms Glass said today: "The comments I made were inappropriate and I regret them.
"Concerns about immigration are entirely valid and it's important that politicians engage with them.
"I apologise to the people living in Sawley for any offence I have caused."
Tory MP and Grassroots Out Brexit campaigner Peter Bone said: "It is disappointing that a member of the Remain campaign called a voter a 'horrible racist' for raising perfectly valid concerns about the impact uncontrolled migration is having on the UK.
Brendan Chilton, general secretary of the pro-Brexit Labour Leave, said: "These comments are nothing short of shocking. A significant number of Labour voters want to leave the EU, and have justified concerns with immigration.
"It is because of open-door immigration, among other issues like our national services, that I'm fighting for the UK to leave the European Union. Pat Glass' comments do not reflect the views of a large number of Labour voters.
"The Labour party is split on the EU issue. Let's make no bones about that."
Additional reporting by the Press Association.
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