The Duke of Edinburgh has been admitted to hospital as a "precautionary measure" after feeling unwell, Buckingham Palace says.
A palace spokesperson said the 99-year-old is "expected to remain in hospital for a few days of observation and rest".
A royal source has said Prince Philip does not have a coronavirus-related illness and walked into hospital unaided on Tuesday evening.
The source added he travelled there by car and was not an emergency admission.
Buckingham Palace said in a statement:
"His Royal Highness The Duke of Edinburgh was admitted to the King Edward VII Hospital in London, on Tuesday evening.
"The Duke's admission is a precautionary measure, on the advice of His Royal Highness's Doctor, after feeling unwell."
Philip retired from public duties in 2017 and rarely appears in public.
He has been staying with the Queen at Windsor Castle during lockdown.
More to follow...