MANILA, Philippines (UPDATE 1) -- The National Disaster Risk Reduction and Management council (NDRRMC) said only three were killed in an explosion that hit Two Serendra condominium at the Bonifacio Global City, correcting an earlier report the agency released.

The three victims were men on board an Abenson delivery van which was crushed by enormous parts of concrete that fell from the blast.

The NDRRMC early Saturday said six were killed, including three men inside Unit 501 of the luxury residential tower.

Meanwhile, five others were hurt during the explosion: two men, two women and a 9-year old child all on board a Hyudai Starex van passing near the condominium building. They were all rushed to St. Luke's Medical Center Global City.

Interior Secretary Mar Roxas is set to give a press conference Saturday morning on details of the blast, which occurred at around 8 p.m. on Friday night.

It was earlier reported that a source connected to the team handling the incident said the condominium unit where the blast originated was being used by a transient occupant. The owner of the unit allowed the yet-to-be-identified occupant to to use it from May 31 to June 9.

Roxas, together with President Benigno Aquino III arrived at the scene hours after the explosion.

Two Serendra building was fully evacuated after the explosion. Ayala Land said 10 units on the 5th floor of the building were damaged. -- With a report from Dexter Ganibe, dzMM