Rob Reiner and his spouse Michele had their throats slit by a member of the family throughout a heated argument inside their Los Angeles residence, resulting in their tragic loss of life … TMZ has realized

It is unclear what triggered the argument which went down Sunday afternoon in Brentwood … however we’re advised one in every of Rob’s daughters discovered her dad and mom lifeless and advised police a member of the family had killed them. PEOPLE reviews the couple’s son, Nick, is being questioned in reference to the murders.

Our sources additionally say the daughter advised police the member of the family “needs to be a suspect” as a result of they’re “harmful.”

TMZ broke the story … Rob and Michele suffered lacerations in keeping with knife wounds and LAPD’s Theft Murder Division is investigating the case.

Dispatch audio captures a firefighter calling for backup to the Brentwood mansion round 3:30 PM … although it does not present any additional details about the circumstances within the abode.

Rob was 78. Michele was 68.