Cameron County sheriff's deputies are at the Queen Isabella Memorial Causeway Bridge where a man jumped from the bridge, authorities said.
The incident happened around noon today.
Sheriff Omar Lucio said the U.S. Coast Guard rescued the man from the water.
The sheriff says he received initial information the 47-year-old Brownsville man died of his injuries.
Instead he is listed in critical condition at an area hospital.
Although a vehicle was found near the area where the man reportedly jumped from, authorities are trying to determine if it belonged to the man, Lucio said.