According to reports in the US press, a police officer who came from Ohio to increase security at the Congress spotted a suspicious-looking person near the Congress.
Witnesses said the suspect was armed with two knives and brandished them at police.
POLICE SHOT AND KILLED HIM
Police from Ohio shot and killed the man near the Republican National Convention in Milwaukee.
Former US President Donald Trump appeared before the public for the first time since the assassination attempt during his campaign rally on July 13, attending the Republican National Convention last night.
Trump is expected to give a speech to Congress on Thursday. (AA)