Also two persons were rescued from the rubble and rushed to the hospital for treatment.
The incident happened around 5 a.m on Wednesday after torrential rain on Tuesday night.
It was gathered that the deceased and survivors were homeless residents who usually take refuge in the building at night.
While the state government said three persons died, some residents who assisted in the rescue claimed five persons died.
The commissioner for information in the state, John Okiyi Kalu in a statement, said the developer of the building did not have a permit to erect the structure.
He said the state governor, Okezie Ikpeazu, has directed the Abia State Environmental Protection Agency (ASEPA) and the Aba South local government area town planning Aauthority to immediately ensure a full and safe demolition of the building.
“The government received with sadness news of the collapse of the…