Coldplay lead singer Chris Martin's nagging vocal problems have forced the U.K. rock act to cancel nine European tour dates, due to begin April 1 in Paris. In a post on the band's official Web site, C

Coldplay lead singer Chris Martin's nagging vocal problems have forced the U.K. rock act to cancel nine European tour dates, due to begin April 1 in Paris. In a post on the band's official Web site, Coldplay's manager writes, "Chris has recently been diagnosed with voice exhaustion and has been advised by his doctor that attempting the April schedule as it stands would result in total voice loss and could cause permanent damage."

An April 9 show in New York, which was planned as a makeup for a February concert plagued by Martin's illness, is now in doubt, according to the site. If Martin's voice has healed, the band hopes to resume its touring schedule with a series of U.K. dates in late April.

Coldplay is also planning to team with California-based indie rock outfit Grandaddy for a North American tour, tentatively set to begin in late May and conclude with a June 27 show at New York's Radio City Music Hall. More information is expected in the coming weeks.

Coldplay will be touring in support of its Nettwerk/Parlophone debut "Parachutes," which is No. 61 on The Billboard 200 this week, and features the single "Yellow," which is No. 9 on Billboard's Modern Rock Tracks chart..