An Ohio congressman has returned $100,000 in campaign contributions amid an FBI inquiry into the source of the donations.

The FBI has previously questioned employees of Canton-based Suarez Corporation Industries about combined donations to freshman U.S. Rep. James Renacci (reh-NAY'-see) and state treasurer and U.S. Senate candidate Josh Mandel - both Republicans.

Renacci said in a statement Monday that he is returning 20 checks for $5,000 each.

Renacci faces a challenge from Democratic Rep. Betty Sutton, whose district was reconfigured as a result of redistricting.

Mandel returned $105,000 in questioned contributions in May.

The government had been seeking donor records for retail marketing executive Benjamin Suarez, his family members and employees to either the congressman or Mandel.