David Bowie's record label has refused to deny mounting speculation that the singer is working on a new album.

Reports about Bowie's recording future surfaced last week following a mysterious post on the micro-blogging website Twitter.

In the message ('tweet'), posted on January 5th, a user called David Bowie wrote: "Cheers from a snowy Berlin! Working on some new material!"

The post led to claims that Bowie had returned to the city in a bid to follow-up his 1970s Berlin Trilogy of albums - 'Low', 'Heroes' and 'Lodger'.

A spokesperson for the singer's record label told Gigwise today (January 26th): “Am afraid our line is that we can neither confirm or deny.”

Bowie's last studio album, 'Reality', was released in 2003, but the singer was forced to abandon a world tour the following year due to a heart complaint.

Meanwhile, a report in today's Daily Star newspaper claims Bowie is in talks to perform at the Coachella festival in Los Angeles in April.

Organisers are said to have launched a new bid to attract the singer after discussions for Bowie to headline last year's event fell through.

David Bowie - Through the Years