An affidavit filed in federal court in Akron says 56-year-old Mark Campano of Cuyahoga Falls told an FBI agent that he "did indeed" build the pipe bombs found this week at his apartment. Neither Campano nor the FBI describes a motive or a target in the affidavit, which was filed late Wednesday.

Campano's court-appointed attorney, Donald Hicks, said he had no comment Friday.

Authorities arrested Campano after an explosion rocked his apartment complex Monday night. Police said he was attempting to load shotgun shells when one blew up.

Campano's Ohio medical license was revoked in 2006 because of a 19-year history with drug abuse.

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