MERCER — An Ohio man led police on a 20-mile chase in two states and, when police finally caught up to him in a cornfield, claimed to have a bomb strapped to his body, authorities said.

Yousef Abdel Adhami, 38, of Youngstown, was arraigned Tuesday on charges of fleeing and eluding police, threatening to use a weapon of mass destruction and other crimes. Authorities said they found no explosives on him or in his car.

Police in Hubbard Township, Ohio, began chasing Adhami on Monday night after they said radar showed he was driving 69 mph in a 35 mph zone. Pennsylvania State Police said they joined the chase shortly before 11 p.m. and followed Adhami for about eight miles before he drove into a Mercer County cornfield.

As police were preparing to arrest him, Adhami claimed to have a bomb on his body that he would detonate, said state police Cpl. Douglas Maxwell. Police took the threat seriously because of the chase and because they felt something rigid beneath Adhami's coat, Maxwell said Tuesday.

"He had something under (his clothes) that they felt was kind of hard when they were putting him under arrest," Maxwell said.

Police called in the Allegheny County police bomb squad from Pittsburgh — nearly 60 miles away — and closed a one-mile stretch of state Route 318 in Lackawannock Township. Police found no explosives and took him into custody without incident about two hours later.

Adhami was in the Mercer County Jail on Tuesday, unable to post $75,000 bond.

The district judge who arraigned Adhami had no record of an attorney in the case. The Associated Press could not locate a listed phone number for Adhami.