The school cancelled classes after the threats from the 14 and 15 year old girls were made for two days.
Police have said that the girls created a Snapchat account using the letter 'A', and posted threats about exposing classmates' secrets, even creating false claims about a school shooting.
If you're not familiar with PLL, 'A' was the person who made all the threats to the teenage girls and continued to stalk and hurt them for several years.
Police say the posts even prompted the 14-year-old to write on a bathroom mirror: "I'm still going to shoot up the school. A."
Wow.
No word yet on what has happened to the girls since.