The UK’s longest-serving Queen Elizabeth II, 96, has died at Balmoral after 70 years in power. Earlier on Thursday, her family gathered at her Scottish estate after concerns about her health. With her death, her eldest son Charles, the former Prince of Wales, will lead the country in mourning as the new monarch and head of state of 14 Commonwealth realms.

According to British media reports, the family members have gone to the Balmoral Palace in Scotland, where Queen Elizabeth is now living, due to the emergency announcement that the health condition of the 96-year-old Queen Elizabeth II of Britain is in poor condition.

The palace only announced that doctors have said she needs to be under medical supervision.

The Queen presided over the swearing-in ceremony of the new British Prime Minister yesterday, which was not held at Buckingham Palace as usual but was held at the Queen’s current residence due to the Queen’s health condition.

Queen Elizabeth has been suffering from “episodic mobility problems” since late last year, or difficulty travelling and working long hours, royal doctors have said.

Her eldest son and heir Prince Charles and his wife Camilla have visited her Scottish home where she is staying with his eldest son Prince William, while her other children – Anne, Andrew and Edward – were also on their way to the palace.

A spokesman said Prince Harry and his wife Meghan, who is in Britain, will also travel to Scotland after cancelling several events. My prayers and those of and people across the nation are with the Queen today,” Archbishop of Canterbury Justin Welby said in the tweet @churchofengland

Queen Elizabeth spent one night in hospital last October and has been forced to cut back on public engagements since then. Queen Elizabeth came to the throne on February 6, 1952, when she was just 25, following the death of her father, King George VI.