Sydney man charged with grooming offences

A 56-year-old man accused of grooming a child for sex online has been arrested as he left a crowded Sydney train station.

The man was nabbed exiting Parramatta station's turnstiles by officers from the Sex Crimes Squad who approached and handcuff him about 5pm on Thursday, NSW Police footage shows.

Detectives from the child exploitation unit began engaging online with the western Sydney man over several weeks.

The man believing he was chatting with a 14-year-old boy allegedly engaged in sexually-explicit conversations with the child and made arrangements to meet for sex.

He was taken to Parramatta Police Station and charged with use carriage service to procure persons under 16 and use carriage service to groom persons under 16.

He has been refused bail and is set to appear in the local court on Friday.