Northern Territory Police are calling for witnesses to a series of incidents across the northern suburbs overnight.

Detective Senior Sergeant Rob Jordan from Strike Force Trident said investigations were underway on an attempted robbery, two stolen cars and a ram raid at a Jingili bottle shop.

"A taxi driver was flagged down on McMillans Road shortly after 3am. When he refused to give two men a lift, one of the men brandished a firearm and asked for money. The driver refused and quickly left the scene," he said.

"Police later responded to a ram raid at a Jingili bottle shop involving two stolen cars, a white Hyundai hatch and a Silver Rav4.”

The two vehicles were later seen driving in a dangerous and aggressive manner to avoid Police.

Investigations are continuing as to whether the incidents are linked."

Anyone with information is urged to contact Police on 131 444 or Crime Stoppers on 1800 333 000.