FARGO, N.D. (AP) - Fargo firefighters say a dog set a backyard shed on fire by pulling a heat lamp onto its bedding.

A Fire Department statement says a newpaper carrier reported the blaze shortly after 3 a.m. Sunday.

The fire did about $6,000 worth of damage to the shed and some nearby fencing at the south Fargo home.

An investigation showed the 8-month-old black Labrador puppy started the fire by pulling a temporary heat lamp onto the bedding. The bedding then caught fire.

The dog was not injured, and no humans were hurt.