Davido was trending on social media following reports that he and his fiancee, Chioma Rowland, had lost their son, Ifeanyi.
Eniola Badmus, a popular Nigerian actress and close friend of the singer, broke the news in a now-deleted tweet.
On Monday, the three-year-old boy drowned in a pool at his father’s house in Banana Island, Lagos State.
Benjamin Hundeyin, the state police command’s spokesperson, confirmed the arrest of the singer’s domestic workers.
Meanwhile, in a condolence message to the family on Tuesday, Adekunle Akindele, the caretaker chairman of the Osun PDP, announced the suspension of activities.
Akindele ordered the suspension of all party organs and committees in solidarity with the family.
He described the incident as “a very sad occurrence”.
“We mourn the sorrowful exit of our son, Ifeanyi,” he said.
“We pray for the repose of his soul. It is a sad day, but we remain steadfast in our faith in the Lord of the Universe. Our condolence goes to Davido, our youth ambassador.
“We commiserate with our father figure, Dr Deji Adeleke and the entire Adeleke family. We pray the good Lord grant family the strength to bear this irreparable loss.”