A man suspected of sending fake anthrax letters to 280 abortion clinics nationwide was carrying a powdered insecticide when he was arrested last week, a federal prosecutor said Monday.

        Lab tests showed that white powder found in a stolen car Clayton Lee Waagner was driving turned out to be an insect-killing bacteria that is harmless to humans, U.S. Attorney Gregory Lockhart said.

        Federal authorities say they suspect Mr. Waagner of sending at least 550 phony anthrax threats in two mailings this fall to abortion clinics. Tests showed that some of the envelopes were filled with flour.

        Mr. Waagner, 45, had been on the run since a Feb. 22 jail escape in Clinton, Ill., before he was captured last Wednesday in Springdale. He was armed with a loaded .40-caliber semiautomatic pistol, prosecutors said.

        Mr. Waagner is in jail without bond in Cincinnati awaiting a preliminary appearance scheduled for Friday in U.S. District Court.

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