A British Transport spokesperson said: “Officers were called to the line in Laurieston shortly after 9.30pm on June 18 following reports of a casualty on the tracks. Paramedics also attended, however, sadly a 13-year-old boy was pronounced dead at the scene.
"His family have been informed and are being supported by specially trained officers. The incident is not being treated as suspicious and a report will be prepared for the Procurator Fiscal."
A spokesperson for local support group the Scott Martin Foundation said: “Our love, thoughts and deepest condolences go out to Kailim and his family and friends at this difficult time.
"You are all in our thoughts and we as a family as well as a foundation will be here to support you all in anyway we can now and in the weeks and months to follow.”
The foundation stated a balloon release had been organised in his memory at Quarry Park, in Brightons tomorrow – Tuesday, June 22 – at 7pm.
Those attending are asked to wear a mask and adhere to social distancing guidelines.
A Just Giving page has also now been set up to raise funds for the youngster’s family at this difficult time and has already exceeded its original £2000 target, standing at £2389.