Ten people have been confirmed shot, one of whom is a police officer and another a security guard as a lone gunman remains on the loose in the Navy Yard area of southeast Washington, D.C. There are no further details indicating whether any of the victims have died. U.S. President Barack Obama has reportedly been briefed on the \"active shooting\" situation. Local police, SWAT teams and the FBI have been trying to \"isolate and neutralize\" the shooter for more than an hour, according to local media reports. The shooter is believed to be carrying a \"military-style\" assault rifle