BOISE -- Senate President Pro Tem Brent Hill has requested that legislative auditors investigate the travel expenses of two lawmakers facing allegations of having an extramarital affair.

Hill told The Associated Press Thursday that auditors will begin reviewing the past three years of travel vouchers of Republicans Rep. Christy Perry, of Nampa, and Sen. Jim Guthrie, of McCammon.

Accusations that Perry and Guthrie were involved in an affair first surfaced on a blog published Tuesday.

Guthrie did not respond to requests for comment. A voicemail for Perry is currently full.

Both lawmakers are seeking re-election.