NSW policeman bitten during arrest

A man has been charged after he allegedly bit a police officer while resisting arrest at a Sydney train station.

Police say they tried to stop the 23-year-old man and a woman who used the disabled barrier at Kings Cross train station to access the platform.

The man walked away from officers and became aggressive when they confronted him.

"The 23-year-old man allegedly bit one of the officers on the arm before he was restrained, arrested and taken to Kings Cross Police Station," police said.

The officer was taken to hospital for treatment.

The man was charged with assaulting police causing actual bodily harm, two counts of assaulting police and one of resisting police.

He is expected to face Central Local Court on Friday.