A Concord, N.C., man was charged with describing how to make explosives, in an effort to bomb an abortion clinic, after FBI agents found instructions on the man's Facebook page and caught him in a sting, officials said Thursday.

Justin Carl Moose, 26, is a self-described "extremist, radical" and the "Christian counterpart of Osama bin Laden," according to an affidavit filed by FBI agents. Agents arrested Moose, who lives in a northwest Concord neighborhood, on Tuesday.

His arrest followed an investigation that began after Planned Parenthood alerted the FBI to a Facebook page registered to Moose, which the group said was advocating extreme violence against abortion providers.

Agents began monitoring the page and Moose's private messages. They say he collaborated last week with a confidential informant to plan the bombing of an abortion clinic in North Carolina.

Moose's relatives were reached by phone Thursday and declined to comment. He faces up to 20 years in prison if convicted on federal charges of distribution of information relating to explosives.

According to the FBI affidavit, Moose advocated violence for a variety of causes and communicated with like-minded abortion opponents online.

Moose's Facebook page, which was still public Thursday, contained posts expressing anger at abortion doctors, President Barack Obama's health care plan, and plans to build a mosque near ground zero in New York City. It also included expressions of support for those who have killed abortion providers.

"Whatever you may think about me, you're probably right," he wrote on his Facebook page, according to the affidavit.

"Extremist, Radical, Fundamentalist...? Yep! Terrorist...? Well, I prefer the term 'freedom Fighter.'"

The page also said Moose is the father of three and searching for employment.

Status updates posted beginning in January urge violence, FBI agents said in their affidavit.

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