Hundreds of motorcyclists have joined the cortege for the funeral of two teenagers who died following an incident at a house in Sheffield. A service to remember Tristan and Blake Barrass, aged 13 and 14, was held at Grenoside Crematorium on Thursday. Around 300 motorbikes followed the hearse into the grounds along with two Lamborghini sports cars. The family said both boys had an interest in bikes and cars. Police were called to a semi-detached house in the Shiregreen area in May. Detectives have given no indication about the nature of the incident, but have confirmed it was confined to one property and was not a shooting. The boys' mother Sarah Barrass and Brandon Machin will go on trial later this year charged with their murder. Both are in custody and neither was at the funeral service.