SCRANTON, Pa. (AP) – A Pennsylvania elementary school closed for the day after educators realized that overnight a man had entered the building, got naked and spilled Murphy’s Oil Soap on the gym floor.

Neil Armstrong Elementary School staff originally thought the spilled soap was a prank, but the principal reviewed security tape footage and saw that a man had been on the premises.

READ MORE: Sources: U.S. Representative Mike Doyle To Announce He Is Not Seeking Re-Election In 2022

Scranton Police Chief Carl Graziano says that once inside the school, the man took off his clothes and walked through at least a portion of the school while naked.

School officials decided at about 7 a.m. to close the school for safety.

READ MORE: Former Secretary Of State Colin Powell Dies Of COVID-19 Complications

Graziano says there were no signs of forced entry.

More than 600 students are enrolled at the school, which is expected to reopen Friday.

MORE NEWS: Pittsburgh Weather: Sunny Start To The Week

(Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)