An actor best known for his work on The Walking Dead unleashed a crazed and nonsensical rant on a New York subway train Friday, screaming at passengers so loudly some got up and fled the carriage.

Chad L. Coleman - who played Tyreese on the AMC post-apocalyptic series and Dennis 'Cutty' Wise on the HBO crime drama The Wire - had a complete meltdown on the 4 train as he went through lower Manhattan.

Video taken by a man on the train shows Coleman yelling at people, continually asking them: 'Where is my humanitarian?'

Losing it: Video of The Walking Dead actor Chad L. Coleman shows him screaming on a New York subway train Friday, claiming he heard a passenger call him a n-----

'I’m on The Wire, I’m on The Walking Dead, I’m not trying to play no f---ing games with you!': Throughout the meltdown Coleman reiterates he is an actor on television

According to reports, Coleman was set off by a man and a woman who were whispering to each other, questioning whether he was TV star.

The Inquisitr reported that the man said to the woman: 'No, we don't know that n-----.'

However Coleman happened to hear the comment, and stood up to defend himself, he says.

When no one came to his defense, he started wandering the carriage, ranting: 'Where is my humanitarian? If you care, f---ing care!'

He continued: 'Yes! I’m Chad L. Coleman! I’m on The Wire, I’m on The Walking Dead, I’m not trying to play no f---ing games with you! Yes, I’m an actor! You want me on TMZ, record it.'

As the train pulls in to a stop, people can be seen hurriedly getting off and away from Coleman.

Star: Chad L. Coleman is best known for playing Tyreese on The Walking Dead (left) and also appeared on The Wire and in Horrible Bosses

TMZ, who described the outburst as 'ballistic' and 'earth-shattering loud', were able to get in contact with Coleman.

Coleman told the website that he was sober at the time of the tirade.

He confirmed the story about the couple talking about him.

However he said his talk of 'humanitarians' was in reference to the Baltimore riots, although it is not clear how.

Coleman apologized for scaring the people on the train, but said he felt the need to stand up for himself.

The footage of the meltdown lasts over four minutes and quickly spread online via Youtube.

'I was sober': Coleman claims he was not under the influence during the outburst on Friday

Coleman was a regular cast-member on The Walking Dead until season five.

His character, Tyreese, died in the ninth episode, which went to air in February.

As well as The Wire, he also appeared in Horrible Bosses and The Green Hornet.