A modified lockdown is how all Pittsburgh Public Schools are operating Friday after threats were made on social media.
It's only a half day for students, they have to stay inside at all times, only visitors with appointments may enter, and all athletics are canceled.
The district said threats on social media of possible violence against the school is what caused the lockdown.
A spokesperson said six different schools in the district received threats since Tuesday.
School police are working with law enforcement to track down the threats and the source of them.




