Afrobeats singer Davido is mourning the death of his son, Ifeanyi Adeleke, nearly two weeks after celebrating his third birthday.
Nigerian police have taken eight domestic workers into custody for questioning.
The three-year-old drowned in the swimming pool at his parents' home in the main city of Lagos.
Davido and his fiancée, Chioma Rowland, a popular chef, and influencer, have not yet commented on their son's death.
News of the tragic drowning has been trending globally, with fans and colleagues from the entertainment industry sending their heartfelt condolences to the couple.