Police arrested two men in Central Car Park, Warminster, last Wednesday at about 9pm, after they appeared to be taking items from a charity clothing bank and putting them in a van.
Officers attended the scene and one man was arrested on suspicion of theft. The second man who was inside the clothes bank was also arrested on suspicion of theft when he eventually climbed out.
The men, aged 24 and 27 from Bristol and Gwent respectively, have been released on bail pending further enquiries.
Anyone with information is asked to contact PC Ben Agate on 101 or contact Crimestoppers anonymously on 0800 555111.