Britain's charity regulator has opened an investigation into an African charity co-founded by Prince Harry, a week after the prince and other trustees resigned due to a dispute with the charity's chairwoman.

Sentebale, which provides support for young people in Botswana and Lesotho, has been wracked by controversy since Harry abruptly resigned on March 26, saying the relationship between the board and its chair was beyond repair. Chair Sophie Chandauka later accused the prince of orchestrating a bullying and harassment campaign to try to force her out.