Richland authorities say the mortar that killed a 61-year-old man should have never been sold to a member of the public.

The Tri-City Herald reports (http://bit.ly/L0qIyz) that it's not known where John S. Anderson bought the 3-inch-diameter mortar that malfunctioned and exploded near him when he went to check it. He died at the scene.

Authorities said they have received tips on where Anderson got the fireworks, but Richland police spokesman Sgt. Mike Harrison declined Friday to talk more about the investigation.

They worry that others unaware of the strength of the devices could be injured or killed.

Chief deputy state fire marshal Dan Johnson says any fireworks mortar that is 2 inches in diameter or larger is professional grade and only can be sold to licensed pyrotechnicians.