Pennsylvania school stabbing suspect refused to drop weapons, said he had ...

Keith Srakocic/AP

The deranged Pennsylvania teen accused of going on a stabbing spree at his high school refused to drop his weapons screaming 'I have more people to kill,' according to chilling court documents which upgraded his charges Friday.

As 16-year-old suspect Alex Hribal was tackled to the floor with two bloody knives in his hands he allegedly told his apprehending vice principal, 'No, I am not dropping them, my work is not done, I have more people to kill.'

While authorities have yet to offer a possible motive in the horrendous April 9 attack that injured 21 people at Franklin Regional High a note found in his locker allegedly revealed his excitement of seeing his classmates suffer.

'I can't wait to see the priceless and helpless looks on the faces of the students of one of the 'best schools in Pennsylvania' (when they) realize their precious lives are going to be taken by the only one among them that isn't a plebeian,' the note found and dated three days before the attack read, according to the affidavit obtained by Reuters.

Keith Srakocic/AP

The remainder of the note was not publicly released.

Along with this potential dark glimpse into the suspect's mind, prosecutors announced they are upgrading his charges to 21 counts of attempted homicide. Hribal was initially only charged with four counts as an adult.

As of Friday two of his 21 victims remain hospitalized WPXI reported. They are 15-year-old Greg Keener, who's in critical but stable condition, and 16-year-old Connor Warwick, who's in fair condition.

Keith Srakocic/AP

Hribal's preliminary hearing is scheduled for Wednesday at the Westmoreland County courthouse.

With News Wire Services

ngolgowski@nydailynews.com