Prime Minister Sir Keir Starmer said his thoughts are with the family of a 15-year-old boy who died after he was stabbed at a school in Sheffield, adding the "whole country" will "mourn with them".Officers were called to the scene of the incident at All Saints Catholic High School in Granville Road at 12.17pm on Monday, South Yorkshire Police said.The victim suffered serious injuries and was pronounced dead.

Prime Minister Sir Keir Starmer said his thoughts are with the family of a 15-year-old boy who died after he was stabbed at a school in Sheffield, adding the "whole country" will "mourn with them".Officers were called to the scene of the incident at All Saints Catholic High School in Granville Road at 12.17pm on Monday, South Yorkshire Police said.The victim suffered serious injuries and was pronounced dead.