Jackie Jackson cites the ongoing Los Angeles police homicide investigation, saying he wants to wait until it's finished before commenting.
Michael Jackson: Complete Coverage
Tito Jackson also says its premature to say who did what because all the facts haven't been gathered.
The brothers made the comments while promoting their new reality series on A&E Network, "The Jacksons: A Family Dynasty," which premieres Dec. 13.
Authorities have said their homicide investigation was focusing on Michael Jackson's personal physician Dr. Conrad Murray, but no charges have been filed.
Through a spokeswoman, Murray maintains that he didn't prescribe or administer anything to Jackson that should have killed him.