A gunman, identidfied as Robert Biwers, who reportedly yelled, “All Jews must die,” Saturday assaulted The Tree of Life synagogue in the Squirrel Hill neighborhood of Pittsburgh, killing 11 synagogue visitors and wounding six other people including four police officers, before he was arrested.

Richard Spencer, center, with Jeffrey Raphiel Clark, Jr., right, and Edward Clark during a rally put on by Spencer outside the White House. April 8, 2017 (One Peoples Project)

A man believed to be an online acquaintance of accused synagogue shooter Robert Bowers was arrested  after he posted on a social media site that the massacre “was a dry run” and that “there was more to come”.

He is being held on charges of transportation of a firearm across state lines and possession of illegal, high capacity magazines intended for use with AR-15 weapons, according to the FBI affidavit.

According to One Peoples Project, Jeffrey R. Clark Jr.  was following Robert Bowers, the suspected gunman in the Tree of Life synagogue shooting, on the neo-Fascist social network Gab.

The site reported that two family members were the ones that alerted police to his increased outbursts, particularly after the death of his brother, an affidavit saying that he felt the victims of the synagogue shooting “deserved it” because a homosexual Jewish couple was having an adopted baby circumcised, justifying the attack. “

”The fucking kikes that got shot by the hero #RobertBowers were all active supporters of pedophilia…and every last one of them deserved exactly what happened to them and so much worse,” he wrote in one post, and subsequent posts suggesting the attack was a “dry run for things to come” suggested to investigators that he might have known more about the Tree of Life shooting than surmised.