Hitting

My immediate concern with my 28 month old Autistic son is how to handle hitting.  He hits me, he hits his siblings, and he hits himself.  I think he does it out of frustration, most of the time after being told "no" about something, as he does not communicate well.  All of this hitting has only taught his brother and sister to hit back.  I know not to hit back, but I don't know what to do.  Any suggestions would be appreciated.  :)

page last updated 06/11/2007