Police are investigating after fuel was reportedly stolen from Glasgow Humane Society lifeboats.
The life-saving group, based at Glasgow Green, tweeted about the break-in, which is understood to have taken place overnight.
They said: "To our unwelcome visitors last night, please don't break in again.
"It's not very nice and stealing fuel from lifeboats is pretty scummy. Thanks for leaving the crowbar behind (hopefully with your fingerprints all over it), we're sure @policescotland will find that very useful!"
The organisation has worked to protect people along the River Clyde since 1790, providing education on water safety and provides lifeboat services when required.
Glasgow councillor Eva Bolander described the incident as "both sad and shocking" in a response to the Humane Society's Tweet.
She added: "You are a life-saving service for all users of the river and nearby areas. If anyone don't know how important, think how it would be to have a personal reason to thank you."
Police Scotland confirmed they are investigating the incident.
A spokesman for Police Scotland told the BBC: "We received a report of an attempted break-in premises at Glasgow Green which happened sometime overnight between Tuesday 19 November and the morning of Wednesday 20 November.
"Inquiries are ongoing and anyone with information should contact police."
