Police had launched a manhunt for the man after he escaped following the killing spree.
The assailant had killed a dozen of his family members, including his father, brother and sister-in-law, with a Kalashnikov due to family feud.
Man killing 12 family members in southeast Iran shot dead by police
A 30-year-old man who had killed 12 of his family members in the southeastern Iranian province of Kerman has been gunned down in a police operation intended to apprehend him.
