Our condolences go out to the family and staff of Rep. Paul Gillmor (R-Ohio), who was found dead in his Arlington townhouse today, the Associated Press is reporting. An official cause of death has yet to be determined after staff members discovered Gillmor’s body at his home when they went to check on him after he failed to come in to work this morning — but an email circulating around Republican offices suggest he died of a heart attack. Gillmor was 68.

Gillmor was first elected to Congress in 1988 and represented Ohio’s 5th District. The conservative congressman served on the Energy and Commerce Committee and the Financial Services Committee. An official announcement from Republican Leader John Boehner is expected shortly.