An air ambulance with seven people on board made an emergency landing in a field in the Najafgarh area of south-west Delhi on Tuesday afternoon after both its engines failed.
Police said the chartered plane of Alchemist Airlines was on its way from Patna to the national capital.
No casualties were reported and the injured passengers were taken to Rao Tula Ram Hospital and Medanta in Gurgaon. Police said one of the flyers is gravely injured.
It could not be immediately established what caused the engine failure and who is the patient flown from Patna for treatment in the Capital.
At least 12 fire tenders were rushed to the spot, officials said.
