Alleged hair salon killer behind bars

A teenager remains behind bars after he was accused of murdering another young man in a stabbing at a Sydney hair salon.

Fredon Laith Botrus, 18, didn't apply for bail and it was formally refused by magistrate Robert Rabbidge during an appearance at a Parramatta court on Saturday.

Police say his alleged victim - a 20-year-old man - died at Liverpool Hospital about 5pm on Friday, more than four hours after he was stabbed at a hair salon in Bossley Park.

Court documents identified the alleged victim as Alfredo Isho.

Botrus faced court via video link on Saturday after he was arrested on Tallowood Crescent in Bossley Park on Friday afternoon.

His case is next due to be mentioned at Fairfield Local Court in March.