UPDATED 3:00 pm
The Harris County Sheriff's Office is confirming multiple casualties following a shooting at a Texas Gulf Coast high. The sheriff's office tweeted they're working a "multiple-casualty incident" at Santa Fe High.
10 people have now been confirmed dead in a Texas High School shooting this morning. CNN is reporting 9 students and 1 teacher were killed in the attack.
There are additional casualties, as many as 10 at area hospitals. A school resource officer and a police officer are among the injured. The police officer is in critical condition.
A 17-year-old male suspect Dimitrios Pagourtzis, a student from the school, is in custody. Two others are being detained for questioning. According to the Texas Governor, the shooter had intended to commit suicide after the shooting but chose to give himself up instead.
Two weapons were used in the attack, a shotgun and a .38 revolver. The weapons were attained from the shooter's father, though it is not known if the father was aware.
Explosives have been found on campus.
Authorities are also on the scene of a home four miles from the school, where explosives may have been left behind.
A gunman walked into an art class at Santa Fe High School and began firing what looked like a shotgun, a witness told KTRK TV.
Watch live coverage here: ABC 13 Houston