Rick Huxley, the bassist for the 1960s British Invasion pop-rock group the Dave Clark Five, has died, the band's leader said on Tuesday. He was 72.

Huxley died unexpectedly at his home in the English countryside on Monday, Dave Clark told Reuters.

The band scored No. 1 hits on both sides of the Atlantic during its decade-long run from 1960-1970.

“Glad All Over” holds the honor of knocking the Beatles' “I Want to Hold Your Hand” out of the top spot on the UK chart in 1964, while “Over and Over” topped the U.S. chart in 1965.

The cause of death was not immediately known, said Clark, who added that Huxley had been “sprightly and in good shape” despite suffering from emphysema for several years.

“I spoke to him on Friday and he was in great spirits,” Clark said in a telephone call. “He went through a recent doctor's check and had a good, clean bill of health. This came totally out of the blue, and I'm just devastated.”

Clark remembered Huxley for his modest demeanor and humor.

“He always made me smile and I'll miss that immensely,” Clark said. “He was never arrogant and flashy. He was a gentleman and very low key. He was a very, very talented musician and a great friend.”

The Dave Clark Five was inducted into the Rock and Roll Hall of Fame in 2008.

Huxley was born in Dartford, England, east of London, the same town that is home to the Rolling Stones lead singer Mick Jagger and guitarist Keith Richards.

Huxley is survived by two sons and a daughter.