DW Sports and Fitness Centre in Bangor has been forced to close to members after an early morning break in on Sunday morning, 27 January.
A spokesperson for DW Sports said: “There was a break in at 5.30am this morning, a few items from the club were stolen and there’s mess everywhere.
“The staff are upset we are unable to open for members today.”
The sports club hopes to reopen this afternoon.
Police have arrested a suspect in relation to the incident.