A teenager has admitted making bomb threats to thousands of schools, including a number in Kent.

George Duke-Cohan, from Watford, sent a mass email to schools in the UK and US, warning about an explosive.

Kent Police was made aware of the messages, which were sent in March this year, and treated them as a hoax.

The 19-year-old also made other false claims against schools, and faked a report of a hijacked aircraft while under investigation.

His actions led to more than 400 UK schools being evacuated.

Duke-Cohan pleased guilty to three counts of making hoax bomb threats at Luton Magistrates Court on Monday.

He has been remanded in custody and is due to appear at Luton Crown Court on Friday, September 21.

National Crime Agency senior investigating officer, Marc Horsfall, said: "George Duke-Cohan made a series of bomb threats that caused serious worry and inconvenience to thousands of people, not least an international airline.

"He carried out these threats hidden behind a computer screen for his own enjoyment, with no consideration for the effect he was having on others.

"This investigation proves that operating online does not offer offenders anonymity. We will identify you and you will be brought before the courts."