US golfer Arnold Palmer has died at the age of 87 after reportedly suffering from heart problems.
The Pennsylvania-born sportsman is widely regarded as one of the greatest golfers in the sport following his success on the course and his role in promoting golf on television.
According to the Pittsburgh Post-Gazette, Palmer was undergoing heart tests at the UPMC Presbyterian Hospital in Pittsburgh when he passed away.
The American won 90 titles during his career, including seven majors - four Masters, two Open Championships and one US Open.
Arnold Palmer Enterprises confirmed the news, with chief executive Alastair Johnston saying: "Today marks the passing of an era. Arnold Palmer's influence, profile and achievements spread far beyond the game of golf. He was an iconic American who treated people with respect and warmth, and built a unique legacy through his ability to engage with fans."
Eighteen-time major champion Jack Nicklaus tweeted: "Arnold transcended the game of golf. He was more than a golfer or even great golfer. He was an icon. He was a legend. Arnold was someone who was a pioneer in his sport. He took the game from one level to a higher level, virtually by himself.
"Along the way, he had millions of adoring fans - Barbara and I among them. We were great competitors, who loved competing against each other, but we were always great friends along the way. Arnold always had my back, and I had his. We were always there for each other. That never changed. He was the king of our sport and always will be."
Palmer won his seven majors across seven seasons and 62 of his tournament wins came on the PGA Tour.