The 17-year-old — who cannot be named due to his age — faces three counts of murder and 10 of attempted murder following the killings Monday in Southport, northwest England.

Teenager charged with murdering three girls in Southport stabbing attack appears in court | A 17-year-old boy, charged with murder and attempted murder after a mass stabbing in Southport, has appeared in court.
Three children, six-year-old Bebe King, seven-year-old Elsie Dot Stancombe and nine-year-old Alice Dasilva Aguiar, died as a result of the attack at The Hart Space community centre.
A "Taylor Swift Yoga and Dance Workshop" aimed at children aged between primary school years two and six (seven to 11 years old) was taking place at the time of the attack in the seaside town, which is north of Liverpool.
The suspect, who is from the nearby village of Banks in Lancashire, but was born in Cardiff, Wales, was arrested on Monday.
He cannot be named due to his age.