(CNN) A Las Vegas security guard who once patrolled his neighborhood with a semi-automatic rifle has been arrested on a federal charge in connection with possessing "destructive devices." The FBI says he had bomb-making materials and was planning to attack a synagogue and a gay bar.

Conor Climo, 23, also chatted online with white supremacists, quoted Adolf Hitler, and drew a sketch for attacks, according to the criminal complaint filed against him.

Climo was arraigned Friday on allegations he had bomb-making materials, which the FBI-led Joint Terrorism Task Force said it found in his home, the complaint states. The alleged crime is possession of an unregistered firearm.

CNN has reached out to his attorney. His mother declined to comment.

"Threats of violence motivated by hate and intended to intimidate or coerce our faith-based and LGBTQ communities have no place in this country," said US Attorney Nicholas A. Trutanich for the District of Nevada.

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