The family of Zineth Malahlela is appealing to the public to help find him.
Malahlela, 27, of Pimville, Soweto who is mentally ill was last seen on Tuesday last week near his home. At the time of his disappearance he was wearing a white T-shirt and khaki Capri pants.
Malahlela's distraught mother, Irene said: "I fear that something bad may have happened to him."
Any person who may have information about his whereabouts should contact Malahlela on 072-442-8289 or 011-938-7896.
Police have also released the picture of Nqaba Ntlonti, 7, who was last seen on Tuesday last week.
The boy was last seen at his Ekukhanyeni Combined School on Main Reef road in Denver.
Anyone with information should contact the Investigating Officer Detective Inspector Cecilia Viljoen on 076-281-8841.