Another explosive device has been found at Woolworths store at Gateway in Durban.
Police spokesperson Thulani Zwane says the SAPS explosives unit is still busy searching for other devices.
The store has been evacuated and cordoned off by police.
On Thursday, explosives were found at two Woolworths stores one at the Gateway shopping Centre and the other at the Pavillion Mall.
The stores were partly burnt after the explosives detonated. No one was injured and not arrests have been made.