A serious stabbing incident took place at Carrick High School in Pittsburgh, resulting in injuries to three students. A 16-year-old student has been taken into custody as the suspected perpetrator. One of the victims is reported to have sustained critical injuries. Authorities responded promptly, putting the school on lockdown during the situation. Students described the frightening moments following the attack, with some sending desperate messages to their parents asking to be picked up. An investigation is ongoing as the community grapples with the ramifications of this disturbing event.