NORWALK — A city man accused of showing interest in “committing a mass shooting” in a social media post — who had allegedly obtained rifle parts online in an attempt to build his own rifle — was charged with illegal possession of large capacity magazines Thursday, according to police.

Brandon Wagshol, 22, of Norwalk, was charged with four counts of illegal possession of large capacity magazines after he was arrested Thursday in a joint investigation between Norwalk police and the Federal Bureau of Investigation.

The FBI’s National Threat Operations Center had received a tip that Wagshol was “attempting to purchase large capacity rifle magazines from out of state,” a news release said. The FBI and Norwalk police immediately launched an investigation.

During the investigation, officers found that Wagshol was buying rifle parts online in an attempt to build his own rifle, police said, adding that Wagshol “had a Facebook post that showed his interest in committing a mass shooting.”

As the investigation proceeded, a search warrant was issued for Wagshol and his home. On Wednesday night, Wagshol was detained by Special Services Officers outside his Bedford Avenue home. The warrant was then executed by members of the Emergency Services Unit Tactical Response Team.

As they searched the home, officers seized a .40 caliber handgun, a .22 caliber rifle, a rifle scope with a laser, four firearm optic sites, a firearm flashlight, body armor with a titanium plate, a full camouflage outfit, a ballistic helmet, tactical gloves, a camouflage bag, computers, and numerous .40 caliber, .22 caliber and .300 blackout rounds of ammunition, police said.

The guns were registered to Wagshol’s father, who lives at the home. Police said the guns were accessible to Wagshol. Police said the father has not been charged with anything as of Thursday, but that the investigation is still ongoing.

Photo: Contributed Photo / Norwalk Police Department

“We are thankful for our partnership with the FBI and fantastic teamwork that quickly brought this investigation from a tip to an arrest” Norwalk Police Chief Thomas Kulhawik said. “I applaud the excellent work of our officers and the FBI agents that assisted and remind people, if they see something, say something.”

Wagshol is being held on a $250,000 bond and is scheduled to appear Friday in state Superior Court in Norwalk.

“With our local partners we gather, share and act upon threat information as it comes to our attention. As in this case, a tip from a vigilant citizen helped the FBI and the Norwalk Police Department disrupt a potentially dangerous situation,” FBI Special Agent in Charge Brian Turner said. “We continue to urge the public to please remain alert and to report to law enforcement any suspicious activity that is observed either in person or online.”

Norwalk police remind residents of their options to submit tips to police: call 203-854-3111, submit tips online at www.norwalkpd.com and send anonymous texts can be sent to 274637 with NPD followed by the tip in the message.