MIAMI – (CBS4) – Three teens are accused of breaking into at least 18 classrooms at a North Miami-Dade high school.

Police say Ariel Valenti, 19, and Flavio Aburto, 18, and a 17-year-old boy descended on the school just before midnight May 18th armed with hammers, chisels and other equipment to steal computer equipment.

Instead, police say, the trio did not get far. Police arrived at Michael Krop Sr. High School at 1410 NE 215th Street in North Miami Beach after a silent alarm went off at the school.

When police arrived they found Aburto “hiding in the courtyard of the school,” according to the report.

Valenti was found trying to escape a police perimeter.

Both men appeared before a bond court judge Thursday where a judge set Valenti’s bond at $16,000 and Aburto’s bond at $11,000. The 17-year-old was held in juvenile detention.