A group of youths sneaked into Wilde Lake High School on Sunday and set off fire extinguishers before one of the youths pulled a knife on a janitor, police said.

Police said the youths entered the school about 5: 30 p.m. through an unlocked door and were confronted by the janitor.

One pulled a knife and another threw a bike on the janitor's car before the youths fled, police said.

Pub Date: 7/14/98