(CNN) Connecticut authorities arrested a man who they said was interested in committing a mass shooting, had weapons and tactical gear, and made his intentions known on Facebook.

Brandon Wagshol, 22, was detained Thursday after a tip from a citizen that he was trying to buy large capacity rifle magazines from out of state, the FBI and the Norwalk Police Department said.

Wagshol has been charged with four counts of illegal possession of large capacity magazines, and is being held on a $250,000 bond. He is scheduled to appear in court September 6.

CNN has reached out to the prosecutor and defense attorney.

How the investigation started

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