A wildfire burning in the central part of Yellowstone National Park has grown and is putting up more smoke.

The fire about 10 miles west of Fishing Bridge has burned about 425 acres.

However, park officials say it is not threatening any structures or roads and is being allowed to burn for now.

The fire was started by lightning on Wednesday.

It is the biggest of two fires burning in Yellowstone.

The fire danger in Yellowstone National Park is currently rated "high."