A brush fire broke out near southbound Interstate 15, Mission Road, and Stewart Canyon Road Monday afternoon.
California Highway Patrol reported the fire at around 12:30 p.m.
Cal Fire San Diego and North County Fire worked to fight the 2-acre fire, dubbing it the Mission Fire.
The San Diego County Sheriff's Department confirmed Pankey Road is closed in both directions in a tweet at 12:48 p.m.
"No evacuations needed. Fire almost contained," the sheriff's department tweeted out about 30 minutes later.
At 2:24 p.m., Cal Fire said the forward rate of spread was stopped.
While the fire was under control in less than an hour, police continue to investigate its cause, citing potential "people of interest."
Witnesses claim to have seen a man and a woman leaving the canyon in a car around the time the fire started.
The car's license plate number is being investigated, according to sheriff's deputies.
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