Nigerian preacher TB Joshua on Sunday said he would travel to South Africa in the coming weeks to meet families and survivors of a building collapse at his church that killed scores.

A guesthouse at Mr Joshua’s Synagogue Church of All Nations collapsed on September 12 as more floors were being built on top of the existing three-storey building.

It is believed that there were about 350 South Africans visiting the church in the Ikotun neighbourhood of Nigeria’s megacity Lagos at the time of the collapse.

Mr Joshua told the congregation during his weekly morning service that he "will be travelling to SA to meet people from SA and other nations who find SA easier to visit, in memory of martyrs of faith". Mr Joshua also observed a minute silence in memory of the dead.

The death toll from the Nigerian church collapse had climbed to 115 people, with 84 of them South Africans, Jeff Radebe, the minister in charge of SA’s response to the disaster, told reporters on Monday, citing sources in Lagos.

"We understand from our assessment team that the total number of people who have perished is now 115, but those are not all South Africans. South Africans (make up) about 84 (of those who) ... have died."

Nigerian President Goodluck Jonathan visited the church on Saturday and promised to investigate the cause of the tragedy.

He said he would hold talks with stakeholders in the construction industry on how to prevent a repeat of the tragedy, adding that he had expressed his sympathies to President Jacob Zuma.

Meanwhile, 26 injured survivors who were trapped under rubble were repatriated home on Monday.

A military aircraft carrying the survivors, 16 of whom were critically injured, landed at Swartkop air force base, Pretoria, shortly before 11am local time.

The patients were evacuated from Lagos on a plane "equipped to treat critically injured patients," said Mr Radebe.

A 19-member medical team, including specialised doctors, nurses and military paramedics, took care of the injured on board.

On arrival, the patients were carried on stretchers to ambulances and transferred to one of the country’s top government hospitals, the Steve Biko Academic Hospital in Pretoria.

Two surviving toddlers were seen being carried from the plane by military social officers.

Known by followers across the world as "The Prophet" or "The Man of God", Mr Joshua claims to work miracles, including raising people from the dead, healing the sick and foreseeing disasters.