A missing schoolgirl who left the UK on the EuroTunnel train is believed to have gone to Poland, police have said.
Serena Alexander-Benson was last seen by her father leaving their home in Wimbledon, south-west London, at around 7.50am on Friday.
A public appeal was shared widely on social media after the 13-year-old did not arrive at school that morning.
Police officers said the teenager left the country from Folkestone, in Kent, on Friday.
She is believed to have travelled in a car to Poland with a female friend of her mother, who lives in Poland.
A Met spokesman said: "Detectives are not releasing further details at this stage of the route Serena and the woman have taken, nor of how it has been established that they are in Poland, where Serena's mother lives.
"At this stage, the priority of officers is to confirm Serena's exact whereabouts and confirm that she is safe.
"Any potential offences will be considered in due course."
Anyone who may know Serena's whereabouts or who may have seen her as she travelled through Folkestone should call officers at Wandsworth CID on 020 3276 2588.