Tributes have flooded in for a 15-year-old schoolgirl who died after in incident at a friend's house as police probe if drugs were involved.

Dione Melville was at a house in West Lothian at the weekend when she fell ill and an ambulance was called.

She died shortly after and two of her friends, both girls aged 15, were taken to hospital from the property in East Calder at around 9.50am on Sunday.

Dione's headteacher and friends have paid tribute to the "ambitious young lady" who planned to start training as a hairdresser.

Lisa Grubb, West Calder High School acting headteacher, said: "Dione was a popular girl and this is clearly a very upsetting time for her friends and family.

"Dione was an ambitious young lady who had plans to work in hairdressing and in the beauty industry after leaving school in the summer.

"She was very focused on her future and the thoughts of the entire school community are with Dione's family and friends at this incredibly sad time."

STV News understands police are investigating whether drugs were involved in the incident. A report will be sent to the procurator fiscal.

One friend wrote on Facebook: "Rest in peace babe