Carbon monoxide fumes sent seven construction workers to hospitals in the District Monday night, a D.C. fire department spokesman said.

A total of 10 people were affected at about 10 p.m. as they removed asbestos from from a building in the 500 block of 14th Street, department spokesman Lon Walls said.

Of the seven taken to hospitals, six appeared to be in relatively good condition. One was more seriously affected, but he was expected to survive.