UPDATE: PHM officials say PHS will release as normal at 3:17 p.m.; Schmucker will release at 4 p.m.

MISHAWAKA, Ind. -- An investigation is underway after Penn High School received a phone call describing a possible threat outside the school.

According to a release from Penn-Harris-Madison School Corporation, the incident is being investigated as a possible prank "swatting" incident.

Multiple schools, including PHS, Schmucker Middle School, Bittersweet Elementary School, Pennway Alternative School, the Penn Fieldhouse, and PHM's Office of Technology, were put in secure mode.

PHM officials say Bittersweet Elementary is now set to dismiss as normal at 2;20 p.m. Plans for middle and high school students have not been released.