Police investigating the aftermath of a Santa Fe, Texas, high school shooting that killed at least eight people said they have found what appear to be explosive devices inside and outside of the school, and were in process of defusing them.

Two male suspects who were described as “students” have been detained in connection with the shooting, officials said. An injured police officer is being treated. The suspected gunman is believed to be 17 years old, sources told NBC News.

Source: NBC News