UPDATE: Las Vegas police have announced two female students have been arrested for making terroristic threats, threat to pupil and disturbance of school.
Both student are 13 years old and in the 8th grade at Tarkanian Middle School.
LAS VEGAS (KTNV) -- School police say they are working with Las Vegas police to investigate possible threats on social media against specific students.
Screenshots of threats promising to shoot two students and "shank" another at Tarkanian Middle School on specific dates at specific times began circulating on Facebook on Monday.
The threats appear to have been posted on Instagram by the same account.
Authorities have not determined if the threats are credible at this time. So far there have been no arrests.
This is a developing story, check back for more information as the investigation continues.