The head of the U.N. peacekeeping mission in Central African Republic has resigned over the force's handling of a series of sexual and other misconduct allegations.

U.N. Secretary-General Ban Ki-moon told reporters Wednesday he has accepted the resignation of Babacar Gaye of Senegal.

It comes a day after Amnesty International accused U.N. peacekeepers in Central African Republic's capital of indiscriminately killing a 16-year-old boy and his father and raping a 12-year-old girl in separate incidents this month.

That follows allegations that U.N. peacekeepers had sexually abused street children in Bangui and a separate allegation of child sexual abuse against a peacekeeper in the eastern part of the country.

The U.N. mission is also being investigated over how it handled child sexual abuse allegations against French troops last year.