An early morning fire caused damage to a North Platte duplex on Thursday.

North Platte firefighters responded to a structure fire at D and Chestnut Streets just before 6:30 a.m.

City Fire Marshal George Lewis says it appears the fire was electrical in nature.

Lewis said the fire started in the attic of structure and was contained to the attic for the most part. The structure had a low roof, and Lewis said that made it somewhat difficult for firefighters to work in the area.

The fire was brought under control at around 6:40 a.m.

Both residences were occupied at the time of the fire, but Lewis said everyone was able to get out safely and no injuries were reported.

There have been no reports on the amount of damage to the structure. Lewis said the smoke damage was minimal because the fire was contained to the attic.