FIREFIGHTERS were called when a sprinkler system overheated at a wholesalers.
Smoke was spotted coming from the plant room at Bookers, in Airport Service Road, Portsmouth, at 4.30pm on Saturday.
A crew from Cosham arrived to find a lot of smoke but no fire.
Crew manager Gary Ball said: ‘It was an overheated engine in the plant room.
‘We ventilated it and handed it over to the staff for the engineer to fix.’