Student stabbed outside of West Philadelphia high school, police say

A teenage boy is recovering after police say he was stabbed outside a high school in West Philadelphia on Friday. 

Investigators say the 17-year-old was stabbed one time in the backside outside of Parkway West High School just after 2:30 p.m. 

The teen was taken by police to Penn Presbyterian Medical Center where he was placed in stable condition, according to police. 

Witnesses report seeing two people stab the teen, who retreated inside the school building for help.

Authorities have not said what caused the stabbing. No arrests were immediately announced, and the stabbing weapon was not found. 

Investigators are searching for two suspects, one of whom is a student at Parkway West High School.