The former trustees of Prince Harry's African charity Sentebale have told PEOPLE in a statement that they are 'gravely concerned' about the future of the organization following the findings of a probe into the charity going public.

Sentebale was founded by Harry in 2006 and aimed to address the impact HIV and Aids has on young people living in Botswana and Lesotho. Harry set it up with Prince Seeiso, whose mother died in 2003, after he visited Lesotho during his gap year.

Former Sentable trustees who resigned with Prince Harry continue to stand beside the Duke after an internal investigation officially closed a two-decade chapter. In March this year, the Duke