Northern Territory police say they are looking for a second woman in relation to the gunpoint abduction of 25-year-old Monique Edmondson from a women's shelter on Wednesday night.

More than 100 officers are taking part in the hunt for Ms Edmondson and her ex-partner Joshua Walsh, who is believed to have taken her from the shelter in Stuart Park.

Police now say they are also looking for a 23-year-old woman called Joan Bowen, who also goes by the alias Joan Foster.

She is described as 23 years of age, approximately 160cm tall, with a slim build.

Police are describing her as an "accomplice" of Walsh.

Police say she is believed to be in the northern suburbs of Darwin and say they are "very keen to hear from any member of the public who may be able to assist us with her present whereabouts."

An NT Police Facebook page photo of Joan Bowen, aka Joan Foster ( NT Police )

The development came after police this morning announced they had found the black Audi A4 they believe was used in the abduction.

Commander Richard Bryson says it was found after a tip-off.

"It had basically been abandoned and secreted in a location in Palmerston, and if not for the vigilance of a member of the public, we wouldn't have located that vehicle."

The car is now being examined by forensic experts.

Wanted for questioning: Joshua Walsh ( NT Police )

Ms Edmondson, 25, was taken when two men forced their way into the refuge and fired several shots.

Police believe one of them is her former partner Walsh, who is on bail.

Police say there has been a huge public response to their calls for assistance in the case, with people sharing the photos of Walsh and Ms Edmondson on social media.

"We thank the public for it and we also seek more information," Northern Watch Commander Gary Smith said.

"If anyone's got any sort information, no matter how small they think it may be, please just give us a call and it may assist us in some way."

Police say Walsh has a criminal history, is extremely dangerous and should not be approached.

Officers in other states and across the Territory have been notified in case Walsh has fled the area.

Wanted: Joan Bowen, aka Joan Foster