Four people have been taken to hospital after an arson attack on a house on Scorer Street, July 7.
At around 1.30am, police were called to a property in the area after reports of a fire.
Two ambulances were on the scene. Police found a 26-year-old woman and her three children; aged four, two and one.
All managed to escape the house and are being treated for smoke inhalation. They are expected to be discharged later today.
Neighbours were found at the scene trying to extinguish the fire with buckets of water.
Police are treating the case as arson, and believe the fire was started at the front door.
Anyone with information should contact Lincolnshire Police on 0300 111 0300.
— Update 1: Police have arrested a 24-year-old man and 22-year-old woman, both local, in connection with the incident.
They are currently helping with enquiries at Lincoln Police Station.