Updated

A slow-moving forest fire has burned about 3,000 acres of trees on Fort Dix, N.J.

A spokeswoman for the installation says it was still burning Tuesday, six days after it was first reported.

The cause of the fire has not been determined.

Troops at the base, which is used primarily to train reservists and National Guard members for deployments in Iraq and Afghanistan, are not using tracer bullets or heavy machine guns to make sure no other fires start.

The blaze has mostly burned near a firearms range on the Ocean County side of the base.

Fort Dix firefighters are leading the containment efforts.

The state Department of Environmental Protection says it's ready to help if the fire gets off of military land.