DULUTH, Minn. (AP) -

The two inmates who disappeared from a low-security prison camp in Duluth over the weekend are still missing.

The inmates are 64-year-old Michael Krzyzaniak and 67-year-old Gerald Greenfield. They were discovered missing Saturday evening from the federal camp, which is on the former Duluth Air Force Base.

Prison spokesman David Baker said Monday morning the men were still missing. He says he has no further information.

There's no fence at the minimum-security facility. Baker says it's possible the men just walked away.

Krzyzaniak was serving a 12-year sentence for bilking investors out of nearly $26 million. Greenfield was serving four years for conspiracy to commit money laundering in a $2.5 million mortgage-fraud scheme.

Although neither man is considered dangerous, Baker advises anyone who sees them to call 911.