WEST PALM BEACH, Fla. -- A 4-year-old-boy left in a hot SUV died Saturday as his mother was preparing for her wedding in West Palm Beach.

Police said the 29-year-old mother, Mirlande Jean-Baptiste, was having her nails done when she returned to her vehicle to find her son unresponsive.

Paramedics tried to revive the boy but he was pronounced dead at Palms West Hospital.

The Palm Beach County Sheriff's Office said the woman may not have known the boy was in the SUV.

She dropped off children at a relative's house before going to a nail salon to prepare for her wedding. It's not yet know how long the boy, whose name was not released, was left in the vehicle.

Jean-Baptiste was to be married late Saturday afternoon at Elected Church of God in Lake Worth.

"It was supposed to be a big wedding," Pastor Wendell Charles told the South Florida Sun-Sentinel. "We just took the decorations down."