An Ohio man who left the US a year ago to train with Islamic State jihadists was nabbed by the feds Thursday for allegedly plotting to unleash terror in the country, authorities said.

Abdirahman Sheik Mohamud, 23, of Columbus, left in April 2014 — two months after becoming a naturalized citizen — to train and fight with the extremists in Syria, the Justice Department said, ABC News reported.

Islamic State wannabe Mohamud — who has posted the group’s propaganda online — was charged with providing material support to al Nusrah, an al Qaeda affiliate in Syria, according to the feds.

The jihadists trained him in shooting, home break-ins, explosives and hand-to-hand combat, authorities said. He was then ordered to return to the US and commit a terror act, an indictment said.

He returned in June 2014.

“Mohamud talked about doing something big in the United States,” the indictment said. “He wanted to go to a military base in Texas and kill three or four American soldiers execution style.”

Mohamud, who was arrested in February on state charges, was indicted by a federal grand jury on charges of attempting to provide and providing material support to terrorists, one count of attempting to provide and providing material support to a designated foreign terrorist organization, and one count of making false statements to the FBI.

His attorney, Sam Shamansky, said Mohamud will enter a not-guilty plea, the Associated Press reported.