PARKLAND, Fla. (AP) — A 15-year-old Marjory Stoneman Douglas High School student who was shot five times during the massacre is credited with saving the lives of at least 20 other students.

A fundraising site says Anthony Borges was shot in both legs and his back while attempting to close and lock a classroom door last Wednesday:

Anthony is a victim of the shooting at Marjory Stoneman Douglas High School. During this unspeakable tragedy, Anthony was able to save about 20 other students as he attempted to close and lock the door to a classroom. He was shot multiple times (both legs were shot, left upper thigh bone shattered and one bullet went through his back). He has a long road of recovery ahead of him but he is alive and stable.

Our thoughts and prayers are with Anthony and his family. Any help is very much appreciated.

Borges’ friend Carlos Rodriguez told ABC’s “Good Morning America” that the two rushed to hide in a nearby classroom when they first heard gunshots. He says no one knew what to do, but that Borges “took the initiative to just save his other classmates.”

Borges’ GoFundMe had raised nearly $356,000 as of Tuesday morning from almost 11,000 donations. The legitimacy of the fundraising page was confirmed by the Broward County Sheriff’s Office.