‘Zombie’ hitmaker, The Cranberries lead singer, Dolores O’Riordan was found dead in her room at the London Hilton hotel on Monday, January 15.

“They found her in the bathroom. But the staff that found her have not said anything more, so we don’t know if it’s suicide or what,” a staff member told the Daily Mail.

O’Riordan’s publicist did not comment on how she died, however, described death as ‘sudden’ and the family is ‘devastated’.

Meanwhile, her bandmates mourned on Twitter after the news broke.

The Cranberries singer had been in London to record a cover of their hit single Zombie with rock band Bad Wolves. Dan Waite, who was involved in the collaboration between her and Bad Wolves, said: ‘She was looking forward to seeing me in the studio and recording vocals,” according to the Daily Mail.

Despite her international success with her band, O’Riordan suffered from bipolar disorder and depression throughout her career, and US website TMZ yesterday reported friends describing her as ‘dreadfully depressed’ in recent weeks.