A cyclist fell to her death when a drawbridge connecting Palm Beach to the Florida mainland began rising before she could reach the other side.
A bystander tried to pull her to safety but lost his grip, officials said.
The woman was walking her bicycle towards West Palm Beach and was within 10 feet of the barrier arms that halt traffic when the drawbridge started to move, police said.
“The woman tried to hang on. There was a bystander nearby who tried to help her, but tragically she fell five or six stories below where she died landing on concrete,” West Palm Beach police spokesman Mike Jachles said.
Mr Jachles said that why a bridge worker began raising the span before it was cleared of pedestrians will be a focus of the investigation. The bridge tender was described as “distraught” in newspaper reports.
“Palm Beach is accessible only through three bridges and this is the main bridge, so it’s very used by cyclists,” bicycle safety advocate Juan Orellana said.
The bridge is equipped with bells and whistles to alert drivers and pedestrians that the drawbridge is going up.
“For one thing you will hear the bell before the arms go down, so when you hear the bell you gotta get out of the way before the bridge goes up,” he said.
The woman’s name has not been released. The bridge was closed for more than six hours after the accident.