Around £700 raised for charity has been stolen from a Lincoln gym.
Fit Space, in Tritton Road, had the cash taken between 10.30pm and 10.40pm on Thursday, June 14.
It is believed that two offenders forced the fire door at the side of the gym and then used a bell bar to force entry to the shop door inside.
The cash, which had been raised for a terminal-ill member, was taken from the till.
The offenders left the scene through one of the gym's fire doors and headed towards the rear of the building.
Anyone who has any information regarding this incident is asked to contact PC Clive Smith at Lincolnshire Police on 101.