The Northern Territory Police Force has arrested two female youths in relation to an aggravated assault that occurred in Casuarina yesterday afternoon.

Around 2:40pm, police received reports of a disturbance in the outdoor food court of a shopping centre on Trower Road, involving a group of five female youths. Weapons were allegedly involved in the altercation.

It is alleged a 15-year-old female victim was struck multiple times to the head with a blunt weapon before a member of the public intervened and removed the weapon.

The alleged offender then continued to punch the victim before security officers removed the offenders from the area.

St John Ambulance attended and conveyed the victim to Royal Darwin Hospital.

Police later located and arrested two females, aged 13 and 15.

During the arrests, police received reports of a second incident occurring at the nearby bus exchange on Bradshaw Terrace.

CCTV footage showed a 14-year-old female victim was allegedly assaulted with an edged weapon, sustaining multiple wounds to the back of the neck and head by an unknown female offender.

The offender fled before police arrived.

St John Ambulance conveyed the second victim to Royal Darwin Hospital with non-life-threatening injuries.

The third offender remains outstanding, and investigations into both incidents are ongoing.

Police urge anyone with information to make contact on 131 444 and quote reference number P25084989. Anonymous reports can also be made via Crime Stoppers on 1800 333 000.