BRIDGEPORT — A pregnant woman and a man were taken to the hospital after an exterior stairway collapse at a Bridgeport home Friday night, officials said.

Fire units responded to 231 Clinton Avenue around 7:40 p.m. for a report of a “minor structure collapse,” according to dispatch reports.

The dispatcher indicated the call was reported by medics in the area who had already transported those who were injured.

The stairway that collpased, fire officials on scene Friday night reported, was from the second floor. Fire officials said no one was trapped.

Fire spokesman Terron Jones said firefighters arrived at the three-family home to find an exterior rear stairway on the second floor had collapsed, injuring two adults.

The woman and man were transported to St. Vincent’s Medical Center. Jones said “their condition is unknown” Saturday.

The fire marshal division also responded to investigate. The building department was notified.

The building’s owner responded to the scene from Stamford to help with the investigation, Jones said.