Mall of America terror plot thwarted, suspected ISIS sympathizer arrested, FBI announces

An 18-year-old Minnesota man who allegedly pledged allegiance to ISIS and discussed carrying out a mass shooting at the Mall of America was arrested after buying an AK-47-style rifle, magazines and ammunition from an undercover employee, according to newly filed federal court documents.

Sheikhdoon Abdullahi Mohamud had allegedly spent months discussing his desire to carry out an attack, telling an FBI confidential source in September, "I cant wait until I kill kuffar man. October 24 is the day insha Allah," according to an affidavit filed in federal court in .

When the source later asked why he had chosen Oct. 24, Mohamud allegedly pointed to a "Hmong Arts Celebration" at the Mall of America, saying it would have "a lot of people," the affidavit states.

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Mohamud is now charged with knowingly receiving a firearm and ammunition while knowing or having reasonable cause to believe they would be used to commit a felony and federal crime of terrorism.

This is a developing story; check back for updates.