Flowers have been laid at the Nicolson Institute in tribute of Anton Michael, 15, who died on Tuesday.
Emergency services were called to the school around 2.30pm and transferred the fourth year pupil to the Western Isles Hospital where he later died.
A confidential 24-
The number is being publicised to pupils in all secondary schools across the Western Isles.
Frances Murray, rector of the Nicolson Institute, paid tribute to Anton Michael.
Mrs Murray said: “This is a tragic incident.
“Anton was a lovely young man who was well regarded by staff and pupils and made a very positive contribution to the school.
“His death is affecting the entire school community.
“Our thoughts at this time are with Anton’s parents, family and friends.
Mrs Murray added: “We appreciate the support by the emergency services yesterday.
“They did all they could but unfortunately could not save Anton’s life.”
She said: “With assistance from the comhairle we have put in place appropriate support and counseling services for staff and pupils.
“A confidential 24-
She continued: “We are grateful to all those who have contacted the school to express their sympathy.
All parents of Nicolson Institute pupils have received a message from the director of education, Bernard Chisholm, regarding the incident in the school.
Today pupils left flowers in memory of Anton at the historic clock tower in front of the school.
A message amongst the tributes read: “Those we love don’t go away. They walk beside us every day…Unseen, unheard but always near. Still loved, still missed and very dear.”
As a mark of respect, Thursday’s school concert has been postponed.
All Christmas socials and event are put off until next term including the 6th year Christmas dinner dance.
Police Scotland said there are no suspicious circumstances surrounding the teenager’s death. In line with all sudden deaths a report will be submitted to the procurator fiscal.
Tribute paid to Anton Michael who died following tragic incident
13 December 2017
The school flag is at half mast
Emergency services attended at the school