An official cause of death is yet to be released, buttributes are flowing on Twitter.
Shocked and heartbroken over Dolores O’Riordan’s death. The Cranberries were pinnacle in showing me that it was possible to fully embrace masculine and feminine energy in one cohesive sound. She was a true pioneer 💔
Absolutely shocked to hear about the passing of Dolores O'Riordan! @The_Cranberries gave us our first big support when we toured with them around France years ago! Thoughts are with her family and friends
O'Riordan was still in her teens when she auditioned for the group that would become The Cranberries.
With The Cranberries, O'Riordan released five albums and achieved mainstream success in the mid-Nineties. In 1997, they won an Ivor Novello award for Zombie, and were nominated for the Best International Group Brit Award in 1995.
O'Riordan pursued a solo career in the late-Noughties, releasing the first of two solo albums in 2007.
At the time of her death, she had been working with a band called D.A.R.K, which featured Ole Koretsky and Andy Rourke, of The Smiths.