UPDATED: Two men and two women have been arrested after allegedly stealing alcohol from a business, with one man alleged to have assaulted a security guard at the business, NT Police said.

Detective Acting Senior Sergeant Trent Abbott said in a statement on Tuesday that about 6:25pm on Monday, police received reports that two men and four women entered a business on Dick Ward Drive, Coconut Grove and stole an unspecified amount of alcohol.

He said one of the men allegedly assaulted a security guard before the group left.

“This was a senseless robbery that resulted in injuries to a security guard who was simply doing his job,” he said.

Snr Sgt Abbott said that after reviewing CCTV a 22-year-old man and a 23-year-old man were arrested on Tuesday and were expected to be charged that evening.

In a statement on Wednesday afternoon Snr Sgt Abbott said that on Tuesday night a 27-year-old woman was arrested by detectives from Serious Crime with the fourth and final alleged offender, a 19-year-old woman, arrested earlier Wednesday

Both remain in custody and are expected to be charged later today.

Previously police had said there were four alleged women offenders.

Anyone with any information about the crime is asked to call police on 131 444, or to make an anonymous report through Crime Stoppers on 1800 333 000 or through the Crime Stopper website.