A 31-year-old man has been arrested and charged for allegedly using a replica firearm to threaten and steal from two youths and an elderly man in Tennant Creek on Saturday night, NT Police said.

Police said they responded to the incident around 10:40pm and allege that the 31-year-old stole “a number of small items” from one of the youths, which were not detailed in the statement.

The exact location where the robbery is alleged to have occurred was also not mentioned in the police report.

Police said a short time after robbing the youth, the offender threatened an elderly man with the same replica handgun.

They did not say if there was anything stolen from the latter victim.

Tennant Creek Criminal Investigations Branch detectives arrested the offender on Saturday and charged him with three counts of aggravated assault, and one count each of robbery and going armed in public.

He was to appear at the Tennant Creek Local Court today.

Detective Senior Sergeant Michael Schumacher reminded the public that replica weapons are prohibited to own without a proper permit.

“I commend the actions of the officers for their professionalism in removing the item from the community and would remind the public that it is illegal to own a replica firearm without an appropriate permit,” Snr Sgt Schumacher said.

Authorities are urging anyone who has information on this incident to contact them at 131 444.

They would also like to speak to anyone who witnessed the incidents on Saturday night but did not provide much information on where exactly in Tennant Creek the robbery happened.