He was 15 years old.
According to the BBC, Arthur was found at the bottom of a 60-foot drop, and was rushed to the Royal Sussex County Hospital. He later died from his injuries stemming from the fall.
Cave and his wife, model Susie Bick, confirmed the tragic news in a statement:
“Our son Arthur died on Tuesday evening,” the couple said of their son. “He was our beautiful, happy loving boy. We ask that we be given the privacy our family needs to grieve at this difficult time.”
Police said Arthur’s death was not being treated as suspicious, and the coroner is investigating.
Nick, an Australian musician, is known for his band Nick Cave and the Bad Seeds, as well as The Birthday Party and Grinderman.