Detectives from Hertfordshire Police are urgently seeking to trace 22-year-old Jack Wall in connection with the disappearance of Amelia Arnold, who was last seen on Wednesday.
Wall, of Hadrian's Walk, Stevenage, has been urged to hand himself in to police, who have also issued an appeal for sightings of a Citroen Berlingo van as part of their inquiry.
More top news
Donald Trump has slammed Alec Baldwin's latest impression of him as "unwatchable" and "sad".
The early risers will notice a touch of frost and pockets of fog first thing.
Austria is set vote for its new president again - and possibly elect the first far-right head of state in Europe since World War Two.