Ofcom will investigate comments made by Channel 4 News presenter Jon Snow.
The broadcasting watchdog has received 2,644 complaints for Mr Snow's remark about having "never seen so many white people in one place" on March 29 as pro-Brexit protesters gathered in Westminster on the day the UK was meant to leave the European Union.
The 71-year-old presenter was signing off from the Channel 4 News bulletin when he made the comment.
Channel 4 has already apologised for Mr Snow’s remark.
In a statement, they said: "This was an unscripted observation at the very end of a long week of fast-moving Brexit developments.
"Jon has covered major events such as this over a long career and this was a spontaneous comment reflecting his observation that in a London demonstration of that size, ethnic minorities seemed to be significantly under-represented.
"We regret any offence caused by his comment."
The media regulator will also investigate comments made by Nigel Farage in the aftermath of Mr Snow's on-air quotes.
Ofcom said it has received five complaints over Mr Farage, who said two days later that the Channel 4 News presenter "should be attacked without doubt" for his previous comments.
An Ofcom spokeswoman said of both incidents: "We're investigating whether comments made by the presenters on these programmes broke our rules on offensive content."