The CCTV images of Chi Thi were taken just after 3.30pm at Elstree and Borehamwood Station on Saturday 4 February.
Herts police have released images of a young female and are concerned for her welfare.
Chi Thi Linh Le, aged 17, was reported to have left her home address at around 2pm on Saturday 4 February.
She is around 5ft 4ins tall, of slim build with shoulder-length dark brown hair and brown eyes.
She was last seen wearing a light grey hooded top, black trousers and white trainers, and was also carrying a white jacket and a small white backpack on her back.
Chi Thi has links to the Euston area of London.
The CCTV images of Chi Thi were taken just after 3.30pm at Elstree and Borehamwood Station on Saturday 4 February.
Officers are concerned for her welfare.
If you have information you can report this by quoting ISR 770 of 4 February when:
Liberal Democrats strengthen hold, gaining seats from Labour in Watford local elections. Conservatives retain control…
Once extinct in UK, Ospreys could grace Rickmansworth's Stocker's Lake thanks to a new nest…
UK gets shocked (pleasantly) as Tesla's Cybertruck is about to embark on electrifying "Cyber Odyssey"…
A large house in Watford was struck by lightning early this morning, causing a significant…
A man has been charged with murder of 14-year-old Boy in Hainault Sword Attack.
Marcus Aurelio Arduini Monzo has been charged for the murder of Daniel Anjorin (14) died…
