Chief Thomas Seefeld.

HEROES

Twenty-one students and a security officer were stabbed in the incident, said Dan Stevens, a spokesman for Westmoreland County emergency management.

Two other students suffered minor injuries trying to get out of the school, Stevens added. He added the teenage suspect was not counted among the wounded.

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The suspect was also being treated for injuries to his hands, Seefeld said. By late afternoon, he said, one or two of the victims were “still pretty critical.”

Among those praised for heroics during the incident was Nate Scimio, the student who pulled the fire alarm and helped shield classmates, witnesses said.

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“There’s not enough words to describe how much of a hero he is,” classmate Trinity McCool posted on Facebook.

The victims, most of them 14 to 17 years old, were transported toAshley's (Lelie) game was elevated also. Rod (Smith), just watching him, he seemed to pick it up. I was looking forward to working with those guys and they all did very well and I know they are going to have a great season."

On most memorable moment of his career
"I would probably say Super Bowl XXIII (vs. Cincinnati) on that final drive. I remember the way we moved that ball all the way down the field to win that football game. I remember (Joe) Montana when he was coming into the huddle, he was bent down, and he was pulling grass. Everything went silent, breaking the huddle and just making plays. Then we won the game and all we heard was the crowd cheering and I will never forget