A headmaster has paid tribute to two of his teenage pupils who died after being struck by a passenger train.
An 18-year-old schoolboy and a 15-year-old girl, believed to be Charleigh Disbrey, were killed on Monday night after being hit by a First Capital Connect (FCC) service just outside Elstree and Borehamwood station in Hertfordshire.
They were from the Borehamwood area and both attended Hertswood Academy in Borehamwood, where the boy, who has yet to be named, was in Year 13 and Charleigh was in Year 10.
The academy's headteacher Peter Gillett said: "At the start of the school day today we were contacted by British Transport Police to inform us of an incident that had occurred overnight involving two of our students.
"As a close community, obviously we are devastated by this tragedy. Both students were talented, hard working and well respected members of our academy.
"Our thoughts are with their families at this most difficult time. We are supporting our students and staff in coping with this terrible loss."
There were also tributes to the two pupils on social media sites.
The incident is not being treated as suspicious by British Transport Police (BTP).
In a statement on its website, Hertswood Academy said students and staff were informed of the incident and the school was offering counselling "to those affected by this tragedy".
FCC said it was "a shocking incident", adding that "our hearts go out to those involved".