British police said on Tuesday they had intervened after North Korean embassy officials reportedly told a London hairdresser to take down an advertisement for discount haircuts featuring leader Kim Jong-un.
Mo Nabbach said two officials identifying themselves as being from the state's mission took pictures of his M&M Hair Academy in Ealing, west London.
They then demanded to know his name and ordered him to remove the "disrespectful" poster from the salon window, he told the Evening Standard.
The poster featured a picture of Kim with the slogan: "Bad hair day? 15 per cent off all gent cuts through the month of April."
His son, Karim, said they had put up the poster in response to a recent unconfirmed story that North Korean men were now only allowed to wear the same haircut as Kim.
"He [Mo Nabbach] went to Ealing police station afterwards to file a report just in case anything happened to the salon overnight," he said. "Apparently they [the apparent North Korean officials] went to the police as well."