No one was injured by a fire at holly frontier which began just after noon Wednesday. refinery spokesman Kevin Burke says a leak occurred in a piece of equipment adjacent to the refinery's delayed coker unit. Burke says  the fire was extinguished at about 1:45 p.m. the investigation into the cause of the fire will be handled by the refinery's fire brigade. Wednesday was the first major fire at the refinery since July 28, 2012.