At least 67 South Africans were killed when a church hostel belonging to Nigerian TV evangelist TB Joshua collapsed in Lagos last week, South Africa's President Jacob Zuma has said.
Nigerian rescue workers now say at least 70 bodies have been pulled from the rubble.
It is the deadliest incident involving South Africans abroad "in our recent history", Mr Zuma said.
Mr Joshua, one of Nigeria's best-known evangelists, is popular across Africa.