FLAGSTAFF — The small Walnut Fire, located east of Flagstaff along Interstate 40, is fully contained at a quarter of an acre.

Three engines and two hand crews responded to suppress the fire, which was originally estimated at two acres, but determined to be a quarter-acre at the time of containment.

The interior portion of the fire may continue to produce minimal smoke and may remain visible from I-40 for a short period of time.

I-40 motorists are asked to remain cognizant of fire suppression efforts along the roadway as firefighters continue to monitor the fire.

The Walnut Fire was first reported the morning of April 10. Its cause is unknown.