UPDATE: Tuesday, July 1, 2008 --- 10:25 a.m.

According to an NBC 15 reporter on the scene, two maintenance workers and an inmate were working in the boiler room below the food service area. When they went to re-light the boiler an explosion occured. All three were sent to local emergency rooms with minor injuries.

Damage was confined to the lower level boiler area. As a precaution the entire building was evacuated - including 200 inmates and 10 staff members. As of 10:15am everyone was still evacuated even though the Fire Department crews had left.

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UPDATE: Tuesday, July 1, 2008 --- 9:30 a.m.

The event is being referred to by crews on the scene as a fire rather than an explosion.

Personal have responded to a fire in the food service area, evacuating the housing units connected to the food service area.

Are evacuating as a precaution according to Public Information Director of the institution John Dipko. He did not know if there are injuries.

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Tuesday, July 1, 2008 --- 8:55 a.m.

The city of Fitchburg Fire Department reports they are responding to the Oakhill Correctional Institution for a possible gas explosion. The Fire Department has confirmed there are two minor injuries due to the gas leak.

Oakhill Correctional Institution is located on County HWY M in Oregon.

Fire Department crews are on the scene now.

Stay tuned to nbc15.com for instant updates.