By Heather LangPITTSBURGH (KDKA) -- Pennsylvania State Police are investigating a series of hoax phone calls made to 911 centers on Wednesday that prompted numerous schools across the state to enter lockdowns or go into evacuation mode. While we have no information to indicate a specific and credible threat, we will continue to work with our local, state, and federal law enforcement partners to gather, share, and act upon threat information as it comes to our attention. "The Bellefonte Area School District, Altoona Area School District and Leighton Area School District had to deal with similar incidents