Two construction workers at Wilson High School in the District were taken to the hospital after they were hit by a piece of lumber, a fire official said.
The workers' injuries are considered non-life threatening.
The piece of lumber, a 2 x 4, was part of the scaffolding of the building. It fell and hit the men, who were standing on the ground. Both were wearing their hard hats, according to the fire official on the scene.
Wilson High School is closed this year while crews renovate the building. Students are taking classes on the University of the District of Columbia campus on Connecticut Avenue.