<p>A fire burned through a commercial building in South Los Angeles, sending flames into the night sky on Monday, April 3. Firefighters declared a knockdown after three hours, according to a report</a>.</p><p>The fire ran through duct work at a food-processing plant, and firefighters had to battle flames from outside the building, according to the report. An “active gas leak” contributed to fueling the flames.</p><p>The LAFD Arson Unit is investigating the cause of the fire.</p><br />