Two royal deaths separated by thousands of miles and more than five decades in age have occurred within hours of each other, marking the passing of Europe's oldest reigning monarch, King Harald V of Norway, and the man who once became the world's youngest king, King Oyo of Uganda's Tooro Kingdom.

In Norway, King Harald the Fifth died at the age of 89. Having reigned since 1991, he was one of Europe's longest-serving monarchs and, at the time of his death, the continent's oldest reigning head of state.

Thousands of miles away in Uganda, Tooro Prime Minister Calvin Rwomiire Akiiki announced on Friday that King Oyo Nyimba Kabamba Iguru Rukidi IV had died at just 34 years old. The Omukama of Tooro had been receiving treatment abroad for an undisclosed illness, after kingdom authorities had previously assured the public that he was alive though critically unwell.

King Oyo's path was extraordinary from the very start. Ascending the ancient throne of the Bantu kingdom in 1995 following the death of his father, he was crowned when he was only three years old. Following an internationally recognised coronation that involved a series of tribal rituals, he was guided by appointed regents until he formally came of age at 18.

The Kingdom of Tooro, based near the Congo border in western Uganda, is home to the Batooro people. Traditional kingdoms were banned following independence from British colonial rule before being restored in 1993, meaning monarchs like King Oyo serve as cultural guardians without state political authority. During his reign, Oyo drew the attention of global figures, including the late Libyan leader Moammar Gadhafi, who made multiple trips to Uganda and supported Oyo and the queen mother prior to Gadhafi's death in October 2011.

As he grew older, King Oyo became known as a private, quiet figure. Still unmarried at the time of his death, he was widely regarded as Uganda's most eligible bachelor. Indeed, just this past September, the parliamentary speaker pledged to pay the bride price whenever Oyo chose to marry, which the king acknowledged with a smile from his throne.

Tributes quickly emerged across Uganda following the announcement. Deputy Parliament Speaker Thomas Tayebwa said: "This is very difficult to comprehend," adding, "The departure of His Majesty leaves an immeasurable void in the Kingdom of Tooro and in the hearts of all those who knew and loved him." Richard Rwabuhinga Abooki, a former Toro Kingdom education minister, stated: "It has been a dark evening in Toro," remarking that "a dark cloud of grief and uncertainty hovers over Tooro Kingdom as we mourn the passing of a great leader."

Alongside the confirmation of his death came an unexpected disclosure regarding the royal line. Despite the king never publicly introducing or disclosing that he had welcomed a child during his lifetime, Mr Akiiki confirmed that King Oyo is survived by an unnamed son.

Addressing the succession, the prime minister said: "The continuity of the Crown is assured. His Majesty leaves behind a Prince as his heir, whose identity will be formally revealed at the appropriate time, in accordance with the traditions and customs of Tooro Kingdom." As the kingdom prepares to formally unveil its new heir, I'll be following this one.