This is reported by Sky News with reference to Buckingham Palace.
The Duke is expected to remain in the hospital for the next few days, where he will be examined and rest.
He is reportedly in a good mood.
The source said the hospitalization was not related to the coronavirus.
In December 2019, Prince Philip was admitted to the hospital for preventive “treatment for an existing disease”.
In February of that year, he decided to voluntarily surrender his driver's license after "careful consideration" of an accident in which he had in January.