The Port of New Orleans has filed a $1 million federal lawsuit against the owners of the tanker vessel that struck and sank a New Orleans riverboat on Friday.

The lawsuit was filed Friday evening in the Eastern District of Louisiana and names the Atlantic Asphalt MV, Nave Shipping SA, and Thome Ship Management Pte Ltd. as defendants.

It alleges the maritime mishap caused at least $1 million in damage to the Thalia Street Terminal where the paddlewheel cruise ship American Heritage was docked.