Prince George's County police investigating school threats

PRINCE GEORGE'S COUNTY, Md. - Prince George's County police have increased their presence at three schools Wednesday morning following threats made by email over the holiday break.

According to police, they are investigating threats at schools including William Wirt Middle School, Bladensburg High School, and Parkdale High School.

School district officials told FOX 5's Evan Lambert that police had identified the person behind the threats, and that they do not seem to be credible.