A 14-year-old boy has died after an incident during lunchtime at Lewis Capaldi's old school.
Emergency services were called to St Kentigern's Academy in Blackburn, West Lothian, on Tuesday afternoon.
The school said there was an "isolated incident" within the grounds.
The pupil was taken to hospital but died shortly afterwards.
"Around 1.20pm on Tuesday June 6 2023, officers were called to a report of concern for a 14-year-old boy at a school in the Bathgate area," a Police Scotland spokesman said today.
"He was taken by ambulance to hospital for treatment, but died a short time later.
"His family have been informed and inquiries are ongoing to establish the full circumstances of the death."
The boy has named locally as Hamdan Khaliq, whose relatives said the boy was held in a "chokehold" by another pupil.
Zain Mohammed, a relative, wrote on Facebook: "A boy who’s been bullying him put him in a chokehold and wouldn’t let go. Unfortunately, he passed away this afternoon. I am absolutely devastated.
"The worst thing about it is being passed off as a game they were playing called 'tap out'.
"This wasn’t the case. He was being singled out, and bullied for being different... Nobody intervened, they just watched the poor boy die."
Writing on the school website, headteacher Andrew Sharkey said: "Our thoughts and prayers are with their family and friends and we extend our deepest condolences and offers of support.
"We have set up ongoing emotional support and signposting for students and staff affected by this tragic news.
"We would like to respect the family's privacy at this incredibly painful time.
"We are assisting the relevant authorities with their investigation to establish the facts and we will not be making any further comment at this time."
An initial statement posted on the school's website, in conjunction with West Lothian Council, said: "We can confirm that emergency services were called to St Kentigern's Academy earlier today (Tuesday) following an isolated incident within the school grounds.
"All parents of pupils directly affected have been contacted and we are assisting the relevant authorities with their ongoing inquiries.
"We have set up emotional support and signposting for students affected by today's incident and are unable to comment further at this time due to an ongoing police investigation."
Writing for Teachers' Resource, a publication for education professionals in Scotland, Capaldi, 26, previously attributed part of his success to his time as a student at St Kentigern’s Academy.
"It was a really good school to go to. I think it helped me in terms of becoming better at music," he wrote in around 2018.
