Pleasanton police are investigating an overnight break in at Foothill High School last week.
The burglary was reported at 6:26 a.m. May 11 and apparently took place late Thursday night or early Friday morning.
Access was gained through a hatch in the school's roof, according to a police report, which said that hatch may have been left open after work was done on the school's roof.
The door to the office of Principal John Dwyer was jimmied open and a small safe was stolen but was recovered nearby. The safe had been forced open; less than $1,000 in cash was taken.
Additional details were not available.