OTTUMWA, Iowa (AP) — Authorities have arrested two men suspected of starting a 2006 fire that killed two Ottumwa residents in Wapello County.

The Iowa Department of Public Safety says the two were arrested Monday and are each charged with two counts of first-degree murder. Court records say both have pleaded not guilty and are scheduled for a court hearing on Feb. 1.

They were identified as 28-year-old Christopher Yenger, of Ottumwa, and 27-year-old Zachary Dye, of Council Bluffs.

Authorities say the fire killed 20-year-old Nathan Messer and 22-year-old Seth Anderson, both from Ottumwa.

The Public Safety Department says the case was reopened this month after authorities learned that the fire was started by people who were involved in a physical altercation at the home shortly before the fire was discovered.