A Christian rock band has been torn apart after the guitarist accused his lead singer brother of sexually abusing him when they were children.

Bo Rinehart, who was once a core member of group NeedToBreathe, leveled serious allegations against his brother, Bear, as well as a camp counselor and a youth pastor.

Bear publicly denied the allegations, arguing instead that both brothers were sexually abused by a teenage camp counselor when they were aged six and eight, and that Bo had since conflated 'our shared experience of abuse with a childhood incident he misrepresents.'

The pair formed the popular Christian rock band in 2001 along with two other bandmates.

But Bo left the band five years ago, and this week aired his troubling grievances on Instagram.