Fears are growing for the safety of a 14-year-old girl who is believed to have run away with her 17-year-old boyfriend.
Katie Kelly and Karl Boyle, from Northampton, have not been seen for three days and police are urging them to make contact.
There is a chance the teenagers could still be in the town or have travelled to the Birmingham area.
They were last seen at 9.30am on February 9 and police are growing increasingly concerned for them.
Det Insp Ally White said: "We are appealing for Katie and Karl to contact us or their families to let us know they are well.
"We are particularly concerned for Katie's welfare as she is just 14 years old and are urging anyone who may have seen them to let us know.
Two teenagers #Northampton Katie Kelly, 14, and Karl Boyle, 17, http://t.co/kVRfq5s5PE pic.twitter.com/JsVDV9sgbz
- Child Alerts Uk (@childalertsuk) February 11, 2014
"Katie, Karl, or anyone who may have seen them in the last couple of days, is asked to call police immediately on 101."
Katie is slim, 5ft 4in and has long, dark brown hair and light brown coloured eyes. It is believed she is wearing a green parka coat with a brown/grey fur hood, blue skinny jeans and red and white baseball boots.
Karl is slim, 5ft 9 in, with short mousey coloured hair and brown eyes. He is believed to be wearing dark-coloured tracksuit bottoms, a grey hooded top and grey ankle boot trainers with a white tick on.
Anyone with any information is asked to contact the Police on 101.