The tugboat was allegedly being steered by an crew member with an improper license
A tugboat collided with an oil tanker on the Mississippi River, causing major oil spill of the tanker.
Guard officials have closed 29 miles of the Mississippi River at New Orleans after the 600-foot tanker and the barge collided, breaking the barge in half.
While no-one was injured, more than 419,000 gallons of heavy fuel oil spilled from the barge.
The double-hulled tanker Tintomara was loaded with about 4.2 million gallons of biodiesel bound for Rotterdam.
The tugboat was allegedly being steered by an crew member with an improper license.