The man called 911 just before noon and removed the twins from the vehicle, authorities said. Emergency responders arrived to find the boy dead, AL.com reported. The boy's sister is in good condition, Oxford Police Chief Bill Partridge told the news outlet.
Partridge, who described the children's father as "distraught," said police are continuing to investigate, according to AL.com. No one has been charged in connection with the death, WBMA reported.