MANKATO, Minn. - A Minnesota State, Mankato, student is in custody following an armed assault at the university's library.

Authorities say a male student was grabbed from behind at knifepoint in a bathroom Wednesday night, but was able to escape.

City spokeswoman Shelly Schulz says when police officers arrived they found other students had detained the 19-year-old assailant.

The victim was transported by ambulance to a local hospital with non-life threatening injuries.