Megan Moore's parents said she was a "fantastic" daughter
A 16-year-old girl died after falling under a train while she was running alongside it on the platform of a station in West Sussex.
British Transport Police (BTP) said Megan Moore slipped between the train and the platform at Angmering station near Littlehampton on Saturday night.
She had been tapping on the window of the 2217 GMT London Victoria to Bognor Regis service, BTP said.
The train performed an emergency stop and halted partly inside the station.
Miss Moore, who was studying media at Chichester College, was pronounced dead at the scene.
A BTP spokesman said the incident, which was reported to police at 2357 GMT, was not being treated as suspicious.
Miss Moore's parents, Howard and Lorraine, and her brother Ryan said she was very happy at the college, which she joined in September.
Floral tributes have been laid to Megan Moore at the station
"We would like to thank everybody for being so kind and supportive at this sad and difficult time," they said.
"(Megan) was a fantastic daughter and sister, a kind, thoughtful and spirited girl who was blossoming into a young lady.
"She will always be loved and missed by her family and many friends."
Miss Moore was a former pupil at The Angmering School, which issued a statement saying: "We have been informed of the tragedy and staff and students are supporting each other at this difficult time."
More than 1,400 people have joined a Facebook group set up in tribute to Miss Moore.
BTP said that officers were working to establish the exact circumstances surrounding the incident and appealed for anyone with any information to come forward.