David Bowie's producer claims there are "astounding" tracks left over from recording sessions for the singer's 2013 album, The Next Day.

Tony Visconti spoke at the Music Producers Guild Awards on Friday, where he collected Bowie's innovation honour on the artist's behalf, and said
"two or three" unreleased tracks could be released. According to the BBC, he said he and Bowie were "very excited" by the reaction to the comeback album, which was nominated for the Mercury Music Prize.

"We were very excited with the reaction. Honestly I was in a daze for the first week, because keeping a secret for two years took quite a lot of lying. I almost started believing my own stories! No one believed that David Bowie was going to make another album and so the timing was perfect, because everyone kind of gave up on him," he said.

When rumors began circulating that the 67-year-old star was in bad health and planning to retire, Tony says he was "laughing" because he was fine. "I'm in the studio with a very healthy man who has no problem writing songs, he wrote easily 30 songs for that album," he added.

David Bowie is nominated for two BRIT Awards this weekend for Best Album for The Next Day and Best Male Solo Artist, but he will reportedly not be attending the event on Wednesday at London's O2 Arena.