Jackie, Marlon and Tito Jackson have said they do not want to apportion blame over their brother Michael’s death until the police investigation is over.
Jackie Jackson said he wanted to wait until the Los Angeles police homicide probe finished before commenting.
Tito Jackson said it was premature to say who did what because all the facts about the death of megastar Michael, 50, in June, had not yet been gathered.
The brothers made the comments in Beverly Hills, California, while promoting their new reality series on A&E Network, 'The Jacksons: A Family Dynasty', which premieres on December 13.
Authorities have said their homicide investigation was focusing on Michael Jackson’s personal doctor Conrad Murray, but no charges have been filed.
Through a spokeswoman, Dr Murray maintains he did not prescribe or administer anything to Jackson that should have killed him.