Prince Philip, the husband of Britain’s Queen Elizabeth II, has died at the age of 99, Buckingham Palace announced. The Duke of Edinburgh reportedly died on Friday morning.

A statement posted online reads:

“It is with deep sorrow that Her Majesty The Queen announces the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh.

“His Royal Highness passed away peacefully this morning at Windsor Castle.”

It’s unclear how he died, but as The New York Times reports, he was hospitalized several times the last several years, including this past Februay.

Funeral arrangements for The Duke of Edinburgh are expected to be Buckingham Palace in the coming days. The public is asked to stay away from funeral events because of the ongoing health crisis.

World Leaders Express Condolences

Canadian Prime Minister Justin Trudeau took to Twitter to pay tribute to Prince Philip, remembering him as a man of “great service to others.”

Former U.S. President and George W. Bush and former First Lady Laura Bush, chimed in as well.

Australian Prime Minister Scott Morrison stated The commonwealth family “joins together in sorrow […] for the loss and life of Prince Philip.