British rockers Bloc Party have been forced to cancel a number of gigs because frontman Kele Okereke risks losing his voice.

The 23-year-old singer has damaged his vocal cords and has been ordered by doctors to rest his voice - throwing the band's schedule into chaos.

A source says, "Kele can't sing a note or he could totally ruin his career. Sadly, he's had to cancel a few gigs."