A padlock securing the college gate on to Cornwall St had been cut off to allow a vehicle to be driven on to the school, he said.
This week thieves also smashed their way into the golf shop at Masterton Golf Club to help themselves to specialist playing gear worth $20,000, plus the contents of a safe.
Goldpine was also hit, with a safe containing cash, industrial staplers and a nail gun taken.
In one of the most brazen of recent burglaries, thieves raided Matahiwi Winery in Paierau Rd about 6.30am last Friday, driving away with a blue fuel tanker containing about 200 litres of diesel.
Mr Hooker said day was breaking around the time of the burglary and people making their way to work on Paierau Rd may have noticed the tanker being towed.
He said the tanker had noisy wheel bearings, which could have been heard by some of the home owners along the road as the thieves towed it past their properties.
To reach the tanker, the intruders broke into a secured yard by cutting chains.
They also jemmied open the door to the workshop, but this had activated alarms. Staff were quickly on the scene but by then the thieves had managed to make their getaway after taking tools from the room. Mr Hooker said the winery had been hit by thieves last year when a truck, quad bike and washing machine were stolen.
Police weren't certain whether the burglaries were the work of one gang or committed by several burglars.
The public's help would be vital in helping police gather enough evidence to determine who was responsible and to arrest them, Mr Hooker said.