A violence-obsessed teenager is due to be sentenced for stabbing three young girls to death at a Taylor Swift-themed summer dance class.

A British teen pleaded guilty Monday to murdering three girls and attempting to kill 10 other people in what a prosecutor said was a “meticulously planned” stabbing rampage at a Taylor Swift-themed dance class in England last summer.

Prime Minister Keir Starmer says "fundamental change" in how the British state protects its citizens is needed.