The watchdog, Ofcom that received the complaints said that it will look into the issue. Marcus, a 35-year-old window fitter reportedly imitates former housemate Sree's Indian accent.
Apart from Marcus imitating the Indian's accent, there are complaints on Marcus threatening Sree.
"Big Brother intervened and took immediate and appropriate action relating to the argument between Sree and Marcus," a spokesman for the show said.
Informing that Marcus Akin has received a formal warning for using threatening language, he added, "Threatening language and behaviour is not acceptable in the Big Brother house."