Over 100 firefighters from 25 units responded to an early-morning fire at a five-story Upper East Side building this morning. An FDNY spokesman tells us the fire broke out in the basement of 444 East 88th Street around 5:30 a.m., and quickly spread through a shaftway all the way to the top floor "cockloft" (which we just learned is a "small loft, garret, or attic."). Two firefighters and two residents in the building sustained minor injuries, but one firefighter is currently listed in serious condition at New York-Presbyterian Hospital.

The FDNY tells us the fire was brought under control at 6:58 a.m. It's unclear how the fire started, and details about the firefighter's injuries were not immediately available, but we'll update as soon as we know more.