CCTV footage has been released after a high value burglary in Jerusalem Road, Skellingthorpe.
Two sets of car keys and a significant amount of cash were stolen between 2:30am and 6am on September 2.
It is believed that offenders got into the house through an unlocked front door and searched the property before stealing the items.
Officers are keen to trace the people on the bikes pictured, who were seen in the area at the time.
Call Lincolnshire Police with information on 101, or call independent charity Crimestoppers anonymously on: 0800 555 111.