Lostprophetshave released a new statement regarding frontman Ian Watkins' crimes.
Last week, the 36-year old pleaded guilty to a number of child sex offences, including the attempted rape of an 11-month old baby.
The remaining members of Welsh rock band - Mike Lewis, Jamie Oliver, Luke Johnson, Lee Gaze and Stuart Richardson - stated on their official Facebook page: "Earlier this week, we learned that the allegations of child sexual abuse against Ian were true, and that he would not be contesting them in court.
"Until then, we found them extremely difficult to believe and had hoped it was all a mistake. Sadly, the true extent of his appalling behaviour is now impossible to deny.
"Many of you understandably want to know if we knew what Ian was doing. To be clear: We did not."
They continued: "We knew that Ian was a difficult character. Our personal relationships with him had deteriorated in recent years to a point that working together was a constant, miserable challenge.
"But despite his battles with drugs, his egotistic behaviour, and the resulting fractures and frustrations within our band, we never imagined him capable of behaviour of the type he has now admitted."
The group went on to add: "We are heartbroken, angry, and disgusted at what has been revealed. This is something that will haunt us for the rest of our lives.
"Being in a band has always been a labour of love and a platform to inspire people, not to take advantage of them. It's still hard to believe this is happening and that someone we were once so close to has destroyed so many lives, lying every step of the way.
Our hearts go out to Ian's family, the fans and friends he betrayed, and most importantly, the victims of his crimes and others like them."
They concluded: "We hope for justice, but also that Ian will truly take responsibility for what he's done. We would urge any other victims to contact the authorities."
In wake of his arrest, Lostprophets confirmed their split last October.
Watkins is due to be sentenced on December 18.