Joe Biden's cancer has spread further, son Hunter reveals [Courtesy]

Former US President Joe Biden’s prostate cancer has spread beyond his bones and is causing him significant pain, according to his son, Hunter Biden.

In an interview with the BBC, Hunter said the cancer had metastasised beyond his father’s bones and had become increasingly painful and debilitating.

“The cancer has spread, metastasised into his bones and further,” Hunter said. “It’s very painful, and it’s very debilitating in many respects.”

Hunter became emotional while discussing his 83-year-old father’s health, saying it was difficult for the family to watch him battle the disease.