LONDON -- British rock guitarist Alvin Lee, founder of the band Ten Years After, has died. He was 68.A statement posted on Mr. Lee's official website said he died Wednesday unexpectedly from complications after a routine surgical procedure. Former bandmate Leo Lyons also confirmed Mr. Lee's death. It was not immediately clear where he died.The Nottingham, England-born guitarist founded Ten Years After in 1967, and the band's popularity exploded after Mr. Lee's rousing performance of the song I'm Going Home at Woodstock in 1969.He left the band in 1975, starting a successful solo career and recording with the likes of George Harrison and Steve Winwood.Mr. Lee released more than 20 albums over a 45-year career. The latest, Still On the Road to Freedom, was released in August.