Tory Dominic Raab and Labour’s Andy McDonald had an angry exchange in the media room of the BBC Question Time debate.
The pair began arguing during a live TV interview on Sky News.
But the pair squared up, and continued the furious row as cameras prepared to cut away.
Mr McDonald accused Mr Raab’s party of “kicking it into the long grass.”
“You should be doing it,” he said of the proposed independent inquiry on Islamophobia in the party.
He added: “Listen to Baroness Warsi” – the Tory peer who has repeatedly criticised her own party for failing to get to grips with Islamophobia.
But Mr Raab hit back, saying: “Two parties in this country’s history have been investigated by the Equalities and Human Rights Commission – Labour under Corbyn and the BNP”.
Mr McDonald jabbed his finger towards Mr Raab, repeating: “You should be doing it. You should be doing it.”
He added: “You should be following Baroness Warsi and you should have your commission.”
Mr Raab walked off.