One person is dead, and 21 others were wounded by gunfire after shots were fired at the end of the Chiefs' Super Bowl parade Wednesday, according to authorities.

Three people have been detained and are under investigation, Kansas City Police Chief Stacey Graves said during a news conference Wednesday evening.

Of the people wounded by gunfire, eight were in immediately life-threatening condition and seven were in life-threatening condition, Kansas City Fire Chief Ross Grundyson said at the news conference.