Britain’s charity regulator has opened an investigation into an African charity co-founded by Prince Harry, a week after the prince and the organization’s board of trustees resigned amid a dispute with the charity’s chairwoman.

Britain’s top charity watchdog announced it has launched an investigation into Sentebale, an African charity established by Prince Harry in memory of his mother, Princess Diana.

After the Duke of Sussex resigned from his role at the HIV and AIDS charity working in Africa on Wednesday, its chairwoman has now accused Harry of "harassment and bullying.”