NASHVILLE, Tenn. — The U.S. Senate campaign of former Tennessee Gov. Phil Bredesen has told the FBI it fears it has been hacked by someone who tried to scam it into wiring money.

In the letter dated Thursday and obtained by The Associated Press, campaign lawyer Robert E. Cooper Jr. says someone pretending to be the campaign's media buyer asked for money to be wired to an international account.

The report comes amid growing concern that candidates in the 2018 election could be targets of cyberattacks.

Bredesen, a Democrat, is running for the open seat in Tennessee vacated by Republican Sen. Bob Corker.