Following yet another petrification incident, Malfoy arrived at Hogwarts and took Hagrid away under the pretext that he was a danger to the school.
Although Dumbledore knew a Basilisk was responsible, they had yet to catch the creature and could not prove Hagrid's innocence to the Ministry of Magic. He could only comfort Hagrid and promise to bring him back.
The students at Hogwarts were confined to their common rooms, where the heads of each house kept watch, demanding that no one leave without permission.
Chapter 132