MADRID—A Spanish official says a 5-month-old baby has died in an accident after being placed on a baggage conveyor belt at the Alicante airport in southeast Spain.

A spokeswoman for airport management company Aena said the baby and its American mother arrived at the airport late Wednesday on a flight from London. She said the father, a Canadian, was waiting for them at the airport.

She said the baby was on the belt that delivers outsize luggage when the accident happened. She had no further details about the incident and spoke on condition of anonymity because of the rules of her job.

Police said they were investigating. The U.S. embassy in Madrid said it was aware of the incident but could not provide further information.