More than 2,000 people have complained after Channel 4 presenter Jon Snow said about a Brexit rally that "had never seen so many white people".
The media watchdog said that Ofcom had received 2,025 complaints and decided whether to investigate it.
Channel 4's anchor made the comment when it was signed from a live bulletin on Friday night.
A spokesman said it was "an unwritten observation", and said Channel 4 News regrets any crime.
Snow was speaking as pictures showed protesters in Westminster after MPs rejected a deal withdrawing from Prime Minister Theresa May on the day the UK was to leave the EU.
Snow told the viewers: "It's been the most amazing day. A day that has seen … I've never seen so many white people in one place, it's an amazing story."
"There are people everywhere, there are crowds everywhere."
A spokesman for Ofcom said: "We are assessing these complaints against our broadcasting rules, but we have not yet decided to either investigate."
The comments criticized by some viewers who described the comments about "white people" unnecessarily.
In a statement, the Channel 4 News, spokesman, said: "This was an unwritten observation at the end of a long week of Brexit developments that was moving rapidly.
"Jon has discussed major events like this over a long career and this was a spontaneous comment that reflected his attention, in a London exhibition of that size, that ethnic minorities appeared to be under-represented." It 's really.
"We regret any crime caused by his attention."
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