Another brazen attack on staff cars at Hawke's Bay Hospital this week has been labelled "mindless vandalism".
Three cars were broken into through the back windows overnight on Tuesday, as staff worked a late shift inside.
It is the second time hospital staff had been targeted in a month, after three vehicles were sprayed with a graffiti symbol for youth tagging crew about 9pm on May 4.
Hawke's Bay District Health Board Chief executive Kevin Snee described the act as "mindless vandalism" while a hospital spokeswoman confirmed authorities had been notified.
"Security is working with police and going through CCTV footage to see if the offenders can be identified," she said.
Two security guards patrolled the hospital at all times, with CCTV cameras covering the car park 24-7.
"The district health board is considering a CCTV upgrade at this time, but to provide full-time security in the car park would not be financially feasible."
People could take measures to prevent the likelihood of a car break-in by making sure not to leave anything valuable in sight - that included items such as laptops, cell phones or handbags.
"These people know the cars are parked there for long periods. Generally it's an opportunist type of crime, for thieves it can be a gold mine," Detective Sergeant Jason Crowe said. "The message is: don't leave stuff in the car that could be easily disposed of by criminals."