An unprecedented alert on sextortion scams targeting teenagers has been sent out to British teachers after the number of reported cases doubled in a year.

Officials at the United Kingdom’s National Crime Agency (NCA) issued the warning on Monday, highlighting the “devastating’’ impact the scams can have on young people duped into handing over intimate photos.

Sextortion is blackmail where criminals threaten to release nude or semi-nude photos of someone, either real or fake unless the victim pays them.

The number of global cases reported to the U.S. National Centre for Missing and Exploited Children has doubled from 10,731 in 2022 to 26,718 in 2023.

This has been common, with a large proportion of victims being boys aged between 14 and 18 years old.

The NCA said nine out of 10, or 91 per cent, UK cases dealt with in 2023 by the Internet Watch Foundation, a UK-based campaign group, concerned male victims.

Gangs based in some West African countries and South East Asia targeted young people overseas, especially in English-speaking countries such as the UK, U.S., Australia, New Zealand and Canada.

They often posed as another young person, making contact on social media before moving to encrypted messaging apps and encouraging the victim to share intimate images.

The gangs in this type of crime were motivated by extorting as much money as possible rather than sexual gratification, the NCA said.

Its Child Exploitation and Online Protection (CEOP) education team issued guidance to teachers on Monday about spotting the signs of this type of abuse, supporting young people and encouraging them to seek help.

It also included guidance for parents and carers on how to talk to children about sextortion and how to support them if they become victims to take away the stigma.

The advice included not paying, stopping communication, and blocking the offender, but avoiding deleting anything that could be used as evidence and reporting incidents to the police or CEOP.

James Babbage, NCA director-general for threats, said: “Sextortion causes immeasurable stress and anguish; we know there are adults and young people who have devastatingly taken their own lives as a result.

“A lot of victims feel responsible but we need them to know this is absolutely not the case; you are not to blame, and help and support are available.’’

Marie Smith, the NCA head of CEOP education, said falling prey to scams has a devastating impact on children and their families.

“This is why it’s an alert, more so than part of our broader education programme because of this callousness that we’re seeing; it’s extremely dangerous.,” she added.

Security minister Tom Tugendhat said sextortion destroys lives, adding, “It is often driven by highly sophisticated organised crime groups that exploit vulnerable people for profit.”

“I will urge parents to talk to their children about their use of social media,’’ he added.

(dpa/NAN)