Police tape is deployed across from the Union Hill Road exit off Route 32 at a crime scene perimeter, April 22, 2016, in Pike County, Ohio. 
Photo by John Minchillo/AP

Piketon massacre: Marijuana ‘grow operations’ found at scenes of family executions

Marijuana “grow operations” were found at three of four scenes where eight members of an Ohio family were found murdered “execution style,” authorities said Sunday.

Ohio Attorney General Mike DeWine said the Friday killings of the eight victims — all members of the Rhoden family of Piketon — was a “pre-planned execution.”

RELATED: Eight dead in ‘execution style’ killings: Ohio officials

“It was a sophisticated operation. And those who carried it out were trying to do everything that they could do to hinder the investigation and their prosecution,” DeWine said, as authorities scoured Piketon for a suspect or suspects.

He said few details about the results of the search would be shared so that they investigation would not be hindered. He would not say whether a suspect or suspects had been identified.

“We will continue to provide you with information in regard to what we are doing. What we are not going to be able to do is provide you results,” DeWine told reporters.

“We will not be telling the bad guys everything that we know.”

He later clarified that he didn’t mean “bad guys” to specifically imply that there was more than one assailant.

This story originally appeared on NBCNews.com.