Police in Lehigh County say they're broadening an investigation into threats made against students who attend Northern Lehigh High School.

Investigators say the threats were made on social media after an off-campus fight in Walnutport last week.

Slatington Police say so far three juveniles have been arrested and charged and they say more arrests are pending.

Police also say they'll  continue patrolling at Northern Lehigh next week, as a precaution.