Two workers were killed when a steel framework fell off a column in a construction site along the Subic Freeport Expressway.

MANILA (UPDATED) - Two workers died after a steel framework fell off a column at a bridge construction site along the Subic Freeport Expressway (SFEX) Tuesday.

Wilma Eisma, chairperson and administrator of the Subic Bay Metropolitan Authority, said in a statement that the two workers, who were at the area where the steel framework hit the ground, were pinned underneath the steel frame, which is approximately 18 meters in length and weighs 180 tons.

The two workers were later found dead.

The steel framework is part of the superstructure of the bridge under construction. SFEX is currently undergoing expansion.

SBMA is still awaiting details from NLEX Corporation, the police and other authorities to shed light on the incident.

"We hope that a thorough investigation would uncover the cause and prevent a similar disaster from happening again," Eisma said.

- with a report from Gracie Rutao