Someone appears to have fallen from the 79th Street Causeway, although it's not yet clear whether it was a suicide attempt or an accident.
"We do have a person in the water, but we are not sure of their condition," said Miami Police spokesman Freddie Cruz. A spokesman for North Bay Village Police said it was a "jumper."
UPDATE: Miami police say the man was a fisherman who fell into the water by accident. Cops sent in rescue divers, but the man died at the scene. Police have not yet revealed his identity.
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Passersby -- including New Times' own Alex Rodriguez -- reported traffic delays and heavy police presence on the bridge:
Something going on on the JFK Causeway. Six cop cars and 2 choppers circling the bridge to Miami. All holding their guns.
-- Alex Rodriguez (@ARodWrites) March 11, 2013