The press regulator has received more than 300 complaints about an article by the Sun columnist Kelvin Mackenzie, in which he suggested that an award-winning journalist should not have been allowed to present a news programme featuring a report of last week's mass killings in Nice because she is a Muslim and wears the hijab.

Mackenzie, also the paper's former editor, said in in his column on Monday: "I could hardly believe my eyes" when Fatima Manji appeared onscreen during the Channel 4 News programme on Friday.

"Was it appropriate for her to be on camera when there had been yet another shocking slaughter by a Muslim?" he wrote on Monday.

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