OXLEY detectives assisted in the arrest of an 18-year-old man and a 12-year-old girl on Saturday at the Gunnedah train station.
Blacktown detectives said the two were sought after an alleged robbery of an elderly man at a boarding house on Anzac Day.
They were charged with robbery in company and cause wounding.
The two alleged offenders appeared before a Tamworth bail court yesterday, with the girl bailed to appear at Tamworth Local Court on May 7.
The 18-year-old had bail refused and will appear via videolink today at Blacktown Local Court.