VANDALS have caused £10,000 worth of damage in a smashing spree at a Huddersfield bus depot.
Police think the same attackers could also have caused a further £2,000 damage at sports changing rooms.
The intruders cut through a wire fence to get into the First Bus depot on Old Fieldhouse Lane, Bradley Mills, between noon and 6.30pm on Sunday.
They boarded eight buses, stole small emergency hammers from them and used them to smash more than 60 windows.
They also stole a fire extinguisher.
First Bus managing director Andrew Scholey said the damage meant one or two bus routes were unable to run a full timetable on Monday.
"All but three buses were repaired on Monday," he said. "It seemed to be a predetermined attack. Whoever did this had deliberately cut the wire fence to get in."
The distinctive steel-tipped, red plastic hammers the intruders stole are carried on buses so passengers can smash the windows to get out in an emergency.
Mr Scholey said: "What happened at our depot on Sunday night was wanton damage. This attack came out of the blue. We think it happened at about 7pm."
The same vandals are thought to have broken into the old changing rooms and offices at Leeds Road Playing Fields on Sunday night.
They smashed 31 windows and broke into the bar and canteen where they wrecked a fire door.
Contact Pc Mark Heywood on 01484 436659 or Crimestoppers on 0800 555 111.