A collision between a crude oil tanker and a service vessel in the Gulf of Mexico has resulted in an 18,000gal oil spill.

The Liberian-flagged, Russian-operated Krymsk collided with the 166ft lightering service vessel AET Endeavor after the Krymsk had received Arabian crude oil from the Vega Star, Reuters reports.

According to reports, one of the tanks of the 820ft Krymsk has been pierced, spilling No 6 bunker fuel.

The crew stopped the leakage by transferring the ship’s remaining fuel, about 45,000gal, to an undamaged tank.

Weather conditions prevented surface vessels from starting a clean up, forcing the US Coast Guard to use dispersants dropped from airplanes.