Carrick High School students returned to the classroom on Monday, days after three students were stabbed during an attack.

Students were back on Monday amid an increase in police presence and resources at the high school. Police said 16-year-old Anthony Taulton brought a kitchen knife from home, concealing it in his bookbag during a search and a pass through a metal detector.

Pittsburgh Public Schools leadership talked to the group of students who witnessed the stabbing on Sept. 24.

"Their main message was they want people to know that this was an isolated incident and they are really proud of Carrick, they are proud of their high school," PPS Assistant Superintendent Nina Sacco said on Monday.

Sacco said that before students returned on Monday, the district ensured all of its me

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