Four people, including two firefighters, were injured Thursday after an early morning blaze swept through a home in Montgomery County, authorities said.

The fire broke out around 4 a.m. in the basement of a house in the 4700 block of Iris Street in Aspen Hill, according to Montgomery County Fire & EMS.

Authorities said two people were rescued and taken to the hospital. One victim, a man, had serious but non-life-threatening injuries. The other, a woman, was unconscious when she was transported to the hospital, authorities said.

Additionally, two firefighters are being treated for minor injuries.

The cause of the fire remains under investigation. Stay with PostLocal for more details as they become available.