Police are appealing for information over an arson attack at a property in Keal Cotes, near Spilsby.
At about 9pm yesterday (Wednesday, October 1), the house in Main Road in the village was set alight and police believe this was done deliberately.
There were no occupants in the property at the time.
Police would particularly like to trace the occupants of a dark-green, old-shaped Corsa that was seen driving towards Spilsby at the time of the fire.
It is thought there were three young males in the vehicle and they may be important witnesses.
Anyone with information should contact Det Con Det Emily Wooll-Rivers by dialling 101 and quoting incident number 491 of October 1 or anonymously to Crimestoppers on 0800 555 111.