Northern Territory Police have arrested and charged two 13-year-old boys following an alleged aggravated robbery at a service station in Palmerston on Sunday afternoon.

At around 3pm, five youths aged between 9 and 13 allegedly attended a service station at the intersection of Yarrawonga Road and Roystonea Avenue.

It is alleged two members of the group entered the store and began stealing food and drink items before one of the youths threatened an employee and attempted to force entry into a secure area behind the service counter.

The youth allegedly left the store and returned with other members of the group, who forced their way behind the counter while a 9-year-old allegedly threatened the employee with a pair of scissors.

The group allegedly stole a quantity of cigarettes before fleeing the scene on foot.

The employee suffered minor injuries to his hands, wrist and knee during the incident.

A crime scene was established, with the incident captured on CCTV.

Police CCTV operators subsequently observed one of the alleged offenders boarding a bus on Chung Wah Terrace. Palmerston General Duties officers intercepted the bus on Driver Avenue and arrested a 13-year-old boy without incident.

A second 13-year-old boy was located a short time later on Schombacher Circuit. He allegedly fled from police before being arrested following a short foot pursuit. Police also recovered property allegedly stolen during the incident.

One 13-year-old was charged with aggravated robbery, breach of bail, damage to property and engaging in violent conduct.

The second 13-year-old was charged with aggravated robbery and engaging in violent conduct.

Investigations remain ongoing to identify and locate the remaining alleged offenders.

Anyone who witnessed the incident or has information that may assist police is urged to contact 131 444.