A stretch of I Street near the White House was shut down Thursday evening after a man plunged to his death from a downtown Washington building, officials said.

Police and fire officials responded to 16th and I streets NW, about two blocks from the White House about 6:15 p.m. and found a man who had plunged from a building, authorities said. Firefighters said the man was presumed dead at the scene, said Battalion Fire Chief Brian K. Lee, a fire department spokesman.

Authorities shut down all lanes of westbound I Street while police investigated. The street was reopened to traffic at about 7 p.m.