The body was spotted in the water of the East River under the Brooklyn Bridge by a family who had travelled from Oklahoma to NY for a holiday. Her husband, Monte Campbell, waded into shallow water near the Manhattan shoreline, retrieved the baby and started CPR.
A family visiting from Stillwater, Oklahoma, spotted the boy, about eight months old, at about 4pm Sunday.
Chiropractor Monte Campbell said his wife, Diana Campbell, first noticed the baby.
First responders pulled the diaper-clad boy from the water's edge and rushed him to NewYork-Presbyterian/Lower Manhattan Hospital where he was pronounced dead.
Cops are investigating the 911 callers' claims, sources said.
Police said a pedestrian flagged down two officers in a patrol auto near South and Dover streets around 4 p.m. and told them there was a child in the water.
There was no parent or guardian present on the scene and the child showed no signs of trauma, police said.
An officer climbed a safety railing and brought the boy onto a walkway, where police attempted CPR as they waited for EMS to respond to the scene. He said the baby had no respiration and showed no pulse.
A medical examiner will establish an exact cause of death.
A baby boy has died after being pulled from the water near South Street Seaport, police say. Both park-lined shorelines are usually teaming with tourists this time of year.