An 11-year-old boy has been charged with murder over a fatal stabbing at Perth's Esplanade bus and train station.

A man, 26, died after being stabbed during a brawl at the station early on January 27.

The boy has been remanded in custody until he appears in court on Monday.

Children can be held criminally responsible for their actions from the age of 10 under federal law.

He is the fourth person to be charged with murder over the man's death.

Two 19-year-olds, Dylan Terrance Wayne Anthony and Clinton Frederick Mead, appeared in court on Friday and were remanded in custody until their next court appearance on February 24.

Another man, whose details have been suppressed, appeared in court earlier in the week.

Witnesses at the scene of the brawl told how bricks were thrown as about 20 people became involved in the melee.