'Beard ripped out' in Perth train assault

A man has been charged over an alleged rampage on a Perth train in which he performed an indecent act in front of a female passenger, assaulted a guard and ripped out part of a man's beard.

Police say the 23-year-old was travelling to Midland about 3.30pm on Thursday when the woman noticed him.

The man then allegedly assaulted a transit guard who approached him, but was restrained by the guard and other passengers.

Police say he grabbed a man's beard during the struggle and refused to let go, ripping out some hair.

The man also allegedly kicked another passenger before he was arrested by police at Midland station.

He will appear in Midland Magistrates Court on Friday charged with eight offences, including assault occasioning bodily harm, two counts of common assault and aggravated burglary.