A former Power Ranger has been arrested for allegedly murdering his roommate with a sword.

Ricardo Medina Jr, the Red Ranger, has been charged with killing Joshua Sutter by stabbing him in the abdomen with the sharp weapon on Saturday afternoon.

The 37-year-old, who reportedly called 911 himself, was taken into custody in Palmdale, California, shortly after, reports claim.

Sutter was taken to hospital and pronounced dead.

Murder accusation: TMZ reported that Ricardo Medina Jr stabbed his roommate in the abdomen and was arrested. He is pictured left at a fan convention and right in Power Rangers Samurai

According to TMZ, the roommates started fighting at around 3.30pm.

Medina went into his room with his girlfriend but Sutter tried to follow them, the report states.

It was then that Medina allegedly dealt the fatal blow.

He has been charged and detained, with his bail set at $1 million.

Medina starred in the 2002 TV series Power Rangers Wild Force before playing Deker in the 2011 series Power Rangers Samurai.

He also voiced Deker in the video game Power Rangers Samurai, and in the movie Power Rangers Samurai: A New Enemy, which hit theaters in 2012.

Born and raised in Los Angeles, California, Medina was also pursuing a singing career and had stints in ER and CSI, according to his IMDb profile.

'Attack': The actor allegedly speared his roommate during an argument then called 911 himself

'He is a great friend and a great client. It's something I can't even conceive. I don't see that in him. He was a very helpful guy and great with his dog. It's such a shock,' said Gar Lester, Medina's former agent who has known the actor for 12 years, told ABC7.

Medina's neighbor, Justin Adamson, said the actor had moved into the block about two months ago.