US police say the suspected gunman at the White House correspondents' dinner had multiple weapons on him when he charged a security checkpoint.
Surveillance video released by Donald Trump shows the suspect running past metal detectors as security agents draw their guns.
Washington DC police chief Jeffery W Carroll said officers exchanged gunfire with the suspect and one US secret service officer was "struck in his vest". He was taken to hospital and is said to be "in good spirits".
The suspect, who police called a "lone gunman", was not struck by gunfire, but has also been transported to hospital to be evaluated.
