A signal fire allegedly set by a person on Otay Mountain near the San Diego-Mexico border grew to a 1-acre blaze Saturday, officials confirmed.
Cal Fire Battalion Chief Preston Fouts said initial reports came in around 11:30 a.m. from people near Otay Lakes Road who saw smoke stemming from Otay Mountain near the Pio Pico Campground.
Fouts said crews attacked the fire both by ground and air. Air tankers and helicopters were able to quickly contain the blaze. No homes were threatened and roads remained open in the area.
The battalion chief said the cause of the fire is under investigation but officials believe someone traveling on the mountain set a signal fire, possibly to get help for someone who was hurt, and the blaze grew.
Fouts said at least one person involved in the fire was hurt; that person was treated by paramedics at the scene. A firefighter also suffered a rolled ankle while responding to the fire.
Further information about the person who started the signal fire was not released. U.S. Border Patrol agents were also investigating the incident.