Update 31 December: The explosion has now been confirmed as originating in a chafing dish – a warming appliance: carbon dioxide is involved in some way in the combustion process. The investigation into the actual cause of the explosion remains open, but the hotel says that it occured when a waitress at the snack bar added some gel to a plate-warming burner, a normal procedure. The hotel added that the appliance was checked and certified as required, but that the technical report from the judicial police is still awaited, and this should clarify matters. The hotel also confirmed that, thankfully, all those injured are recovering well, and said that it would continue to help those affected in any way possible.
Original post 27 December: At least five people have been injured in an explosion shortly after 4pm in a terrace bar in the Bahía Príncipe hotel in Playa Paraiso. One of those affected is a young British woman who has suffered serious burns to her face, neck and scalp; she has been transferred to Candelaria hospital. The others have lesser injuries and have been taken to Hospitén Sur and Quiron Costa Adeje Hospital: they are an 8-year-old British girl; a British man; a 38-year-old Belgian woman; and a 34-year-old woman. The explosion thankfully did not result in a fire, and the cause is initially thought to be a bottle of carbon dioxide, though this is to be confirmed. The Servicio de Urgencias Canario, Policía Local de Adeje, Bomberos and Guardia Civil all attended the incident.