(CNN) -- Six firefighters were hospitalized in Detroit, Michigan on Friday, a hospital spokesman said.
They were hurt when a roof collapsed as they were battling a blaze CNN affiliate WDIV-TV reported.
Brian Taylor, a spokesman for St. John Hospital, said four firefighters were brought to St. John. Three were in fair condition; one was in critical condition, Taylor said.
Two firefighters were taken to Detroit Receiving Hospital, WDIV reported. Their conditions were not immediately available.
CNN's Jessica Naziri contributed to this story