The ambulance was stolen from the Oslo neighborhood of Rosenhoff just after 12:30 p.m. local time, police said.
An armed man has stolen an ambulance in Oslo, injuring three people including two babies when he drove off and hit a family, Norwegian police and hospital officials have said.
Norwegian police opened fire on an armed man who stole an ambulance in Oslo and reportedly ran down several people.
Police opened fire on the vehicle to stop the criminal.
NRK said police were looking for a woman who may have been involved, but authorities would not confirm the report.
He said: "One was hijacked by an armed person with a shotgun".
Photos from the scene showed that the perpetrator wore military green trousers, camouflage jacket and what looked like a bulletproof vest.
Police arrested the man after firing on the vehicle.
Police said those struck by the ambulance included a woman with a stroller and an elderly couple. Pursued by police, the ambulance then crashed into a gate outside a residential building.
"I heard several shots", Omar Khatujev told Aftenposten.
The yellow ambulance smashed into a house wall with a police auto crashed into its rear.
A witness told the newspaper - one of Norway's largest - that he saw "the ambulance driving at high speed toward me. and right behind a police vehicle".
Police did not state whether the incident was being treated as a deliberate attack, and did not say if anyone had died.
Eyewitness footage from the scene captured the second police had the ambulance partially surrounded however the suspect managed to evade them and drive away regardless of being underneath fireplace. "He is not in critical condition".
The man was later apprehended, police added.