Rescuers are searching for a man who fell into the Potomac River early Friday while fishing, officials say.
A witness said the man was sitting on a rock, he fell and then he disappeared, the Arlington County fire department said. They were called to the scene before 7:45 a.m.
Rescuers from Arlington, D.C. and the U.S. Park Police are searching for the missing man in boats and from the air.
People are asked to avoid the area and expect helicopter activity.
Stay with NBC Washington for more details on this developing story.