The report says the collapse at the Pentecostal church occurred as an Easter season service was underway.
A preliminary investigation cited the heavy rains as a primary factor in the structural collapse. The 13 confirmed dead are 12 women and one boy.
"An inquest docket has been opened and police are still at the scene".
He offered the party's condolences to the families of the victims.
The scene of the collapsed roof at a Pentecostal church in KZN on Thursday night.
In statements, the DA and the ANC in KZN said they were saddened by the deaths of the congregants.
KwaZulu-Natal government officials are en route to Ndlangubo where the Easter long weekend has started in tragedy, with a building collapse killing 13 worshipers. We join hands with them, acutely aware of the excruciating pain that they must be going through. "This horrific accident has underlined the need for communal support during these most trying times", Oliphant said. "The building whose wall collapsed would have served as a sleeping area for the female congregants". He said sixteen people were also injured.
"This is a devastating tragedy and all the more that these lives have been lost as we begin our Passover services".
Labour Minister Mildred Oliphant is a member of the church and was planning to attend the Good Friday service there.