Vital rescue equipment has been stolen and damage done to the Sligo/Leitrim Mountain Rescue Headquarters in Sligo Town.
The incident happened between 4pm on Good Friday and 1.30pm Saturday afternoon at Abbey Quarter South, where the base is located.
Equipment needed to help people that may be in danger was stolen such as torches, jackets and backpacks.
Damage was done to the front entrance as well as a number of lockers that were forced open.
Gardai are appealing for anyone with information to contact them at Sligo Garda Station or the Garda Confidental Line and also to be on the look out for such items.
Alan Sayers is with the volunteer service
Sligo Garda Station: 071 915 7000
Garda Confidental Line: 1800 666 111