Shooting in a high school in Maryland, a hundred miles from Washington at Great Mills High School, in Mary County.
According to local media reports, dozens of injured people remained involved. Dozens wounded according to the first information.
"The school is in lockdown and the event is contained," the county school system administration wrote on its website. The situation is "fluid," a spokesperson for the local sheriff's office said. The school is located approximately 100km south of Washington.