Detectives investigating the murder of a "beautiful" teenage girl are continuing to question a 19-year-old man.

The 15-year-old was killed at a house in Bedfordshire in the early hours of Saturday.

Police said officers attended the property after receiving a report that she had been fatally injured, but would not comment on neighbours' claims that she was stabbed to death at a house party.

The semi-detached property was cordoned off and forensic experts were at the scene.

Thorough examinations of the house and the surrounding area are expected to continue today.

Friends of the victim, who has not been named by police, paid tribute to her on social networking sites Facebook and Twitter.

A Twitter user named Mrs Simmons wrote: "Horrible waste of a beautiful life, may justice be served whoever caused this. RIP."

Annie Austin tweeted: "You were taken from us far too young...always in my heart beautiful." Other friends described the teenager as a lovely girl who would "never be forgotten".

One friend posted pictures of the victim with the caption: "my beautiful bestfriend, who was murdered last night. r.i.p beautiful. i love you so much". Another said: "Still can't believe this has happened, going to miss seeing you upto mischief at school".