A planned attack on churches in Coeur d’Alene, Idaho, has been thwarted with the arrest of an 18-year-old man allegedly motivated by ISIS ideology.
Alexander Mercurio now faces federal charges of attempting to provide material support to a foreign terrorist organization. According to court documents, Mercurio pledged allegiance to ISIS online and expressed violent intentions. Prosecutors allege he wrote about having “no desire to do anything except jihad” and a “craving for mayhem and terror.”
Acting swiftly on a tip, the FBI’s Joint Terrorism Task Force arrested Mercurio on April 6th, one day before authorities say he planned to carry out his attacks. Investigators believe he intended to use a combination of knives, firearms, and potentially even fire to target churches in the city.
“This is a stark reminder of the ever-present threat of violent extremism,” said U.S. Attorney for the District of Idaho, Sophia Wright. “Thanks to the vigilance of law enforcement and the public, this attack was stopped before it could unfold.”
A search of Mercurio’s residence reportedly yielded concerning materials, including weapons and potential bomb-making components. Authorities are tight-lipped about the specifics but emphasize the seriousness of the plot.
“This wasn’t just idle talk,” said FBI Special Agent in Charge David Mason. “Mercurio had the means and the motive to inflict significant damage. We’re grateful we were able to intervene.”

Mercurio is currently in federal custody awaiting his initial court appearance. Investigators continue to gather evidence and determine if anyone else may have been involved.
The Coeur d’Alene community is reeling from the news. Local faith leaders are urging unity and expressing gratitude for law enforcement’s actions.
“We are relieved this attack was prevented,” said Reverend Michael Harris, pastor of Coeur d’Alene First United Church. “Our hearts go out to all those affected by this unsettling situation.”