Tomorrow marks a year since Nigerian church collapse

116 people were killed when a guest house at the Synagogue Church of All Nations in Lagos collapsed.

A policeman monitors the excavation of the collapsed guesthouse of the Synagogue Church of All Nations (SCOAN) in the Ikotun neighborhood of Lagos on 17 September, 2014. Picture: AFP.

JOHANNESBURG - Saturday marks exactly one year since 116 people died, most of them South Africans, when a guest house at the Synagogue Church of All Nations in Lagos collapsed, and the church is adamant it's not to blame.

Two months ago, the Nigerian coroner ruled that the church must be investigated and prosecuted for negligence.

The Synagogue Church of All Nations has told Eyewitness News no explosives were used, but it now believes some kind of infrasonic sound weapon was used to bring the guest house down.

Spokesperson Kirsten Nematandani says, "Those sounds are bombarded on the building, the building tended to resonate. In every structure there are atoms and once those atoms are excited, they begin to shake, and that is how we concluded the building came down."

Infrasonic sound is a low frequency which humans can't hear.

Nematandani says an inquiry set up to investigate what caused the building to cave in, didn't even consider the scientific explanation.

The church maintains that pastor TB Joshua cannot be held liable for the tragedy.

WATCH: Lindiwe Ndwandwe who survived for 5 days under the rubble after a guesthouse collapsed at TB Joshua's church in Nigeria says God saved her so she could bring life into this world.