Mexico's state-run oil company Pemex said on Sept. 9 that an early morning fire at its second biggest refinery left no workers injured and did not affect production.

Local television footage showed an intense ball of fire around 2 a.m. local time at the Miguel Hidalgo refinery on the outskirts of the city of Tula and featuring a crude processing capacity of 315,000 barrels per day.

"(The fire) occurred in an area completely away from production facilities," said a company spokesperson, adding that the fire was quickly extinguished.