Howard County police are investigating break-ins at four county schools last weekend.
Police say the incidents may be related, but so far, they have no suspects.
The break-ins occurred at Swansfield Elementary School in the 5600 block of Cedar Lane in Harper's Choice; Glenelg High School in the 14000 block of Burnt Woods Road in Glenelg; Oakland Mills High School in the 9400 block of Kilimanjaro Road in Oakland Mills; and the Howard County School of Technology on Route 108 in Ellicott City, police said.
It is unclear how the burglars entered the schools, but once inside, safes and vending machines were either entered or tampered with, said Detective Michael Sherman.
"We're not quite sure" if they're related, he said. "But that's a good assumption."
Police learned of the break-ins after officials from one school reported a safe was tampered with, he said. Soon after, other school officials notified police, or police learned of burglaries during their investigation.
During the break-in at Swansfield, a small amount of change was stolen, and an unknown amount of money and checks were stolen from Glenelg High, Detective Sherman said. Nothing was stolen during the Oakland Mills break-in, but someone tried to enter a safe and vending machines, he said.
Because officials at the technology school hadn't completed their inventory, it's too soon to tell if anything was taken, the detective said.