The Missouri River swallowed up two people seen jumping from the Kit Bond Bridge at midday.
Traffic was stopped on the span that carries some 100,000 vehicles a day.
Police talked with at least one witness.
Visibility was obscured by snow squalls that whipped the river at the time.
KCUR’s Dan Verbeck gave a description from the site where the river search was launched and ended--“this is Riverfront Park, downstream from the Bond Bridge."