Gunshots fired outside family home of Winnie Madikizela-Mandela
Police are investigating the origin of the shots fired late Friday night.
Gauteng police captain Kay Makhubele says forensic teams were sent to the home in Orlando West in Soweto from early on Saturday morning.
"A case of discharging fire arms in a residential area is being investigated, but so far no on has been arrested."
Makhubele does not want to comment who - if anyone - has been questioned.
"At the moment it's the issue we are investigating, but we believe we will get the people who fired the shots."
No one was injured.
The incident happened while South Africa observes 10 days of national mourning, following the death of the struggle icon and veteran.
Madikizela-Mandela passed away in a Johannesburg hospital on Monday at the age of 81. Since then, her family home in Soweto has become a daily gathering site for hundreds of ordinary members of the public, as well as high profile politicians.
Makhubele adds the area has been re-opened after forensic teams concluded their work by mid-morning on Saturday.
He says police teams will continue to monitor the area.