A 22-year-old male has been arrested following an alleged sexual assault in Alice Springs last night.

The Joint Emergency Services Communication Centre received a call at 10:17pm informing police that a 29-year-old woman had been sexually assaulted by an unknown male in her Eastside residence while asleep.

The victim woke during the offending and screamed, which alerted other members of the residence and the man fled the area in a vehicle.

General duties, Operation Ludlow, and Duty Crew officers responded to the call and established a crime scene.

Soon after a vehicle of interest was identified and apprehended on Gap Road with the alleged offender fleeing on foot.

Following a foot pursuit the 22 -year-old male alleged offender was arrested on Traeger Avenue at 10:39pm.

The man remains in custody with charges expected to be laid later today.

Police urge anyone with information to contact police on 131 444 and quote reference P24340795.

They are keen for 2 unknown persons who exited the vehicle at the time the alleged offender was arrested to contact police.