Fire spreads from homeless camp under Highway 101 ramp near Petaluma

<p>A fire at a homeless encampment got away from whoever started it early Friday morning, sending smoke billowing up from under a bridge at the on-ramp to northbound Highway 101 at the Penngrove exit, authorities said.</p><p>There were no reports of injuries, though a small explosion was heard around the time of the 6:44 a.m. incident, the CHP said.</p><p>Fire crews quickly doused the fire and were in the area mopping up at 7 a.m., dispatchers said.</p><p>Some damage was noted on the underside of the bridge, though it nonetheless appeared safe, fire officials said. But firefighters were calling for Caltrans personnel to evaluate the bridge structure.</p>