Butler Senior High School administrators say they're not yet concerned about a bug found by a student Wednesday.

According to a letter sent to parents by the Principal John Wyllie on Thursday morning, a student “found what they thought was a bed bug” in a classroom yesterday.

“Although we were not able to confirm what type of bug it was, we still treated the room as a precautionary measure,” Wyllie wrote. “The room was thoroughly cleaned and vacuumed last evening.”

Kara Droney, a spokeswoman for the district, said maintenance staff deployed a bug bomb as well.

The principal instructed students to notify a teacher if another bug is spotted, and he said they'll be on the lookout for signs of the insects.

“At this point, we do not believe there is any reason to be concerned,” Wyllie wrote.

Clairton City School District in Allegheny County sent students home early Thursday and will be closed Friday to handle its own bed bug situation.

In September of last year, bed bugs were found in a classroom at Mars Area High School.