The U.S. Coast Guard has called for more tug boats to help free a freighter that ran aground in Lake St. Clair.

A 200-metre long Federal Rideau ran aground in the downbound shipping channel off Peche Island in Lake St. Clair around 3 a.m. Sunday.

The vessel grounded because a motor coupling failed, causing a loss of steering.

U.S. Coast Guard Sector Detroit Command Center Chief Jillian Lamb said the vessel lost steering for 60 seconds and that's when it ran aground.

The vessel grounded because a motor coupling failed, causing a loss of steering.

Lamb said the part has been replaced but the ship remains stuck.

One attempt to refloat the freighter failed Sunday, when one of the two tugs on scene had motor issues.

Five tugs, three of which are expected to arrive between 4 p.m. and 6 p.m. Monday, will truck and free the freighter Monday evening.

"Hopefully we have a smooth operation this evening and we can get them on their way," Lamb said.

The vessel is loaded with 20,000 tonnes of wheat, bound for Montreal.

The United States Coast Guard has checked out the ship and found no pollution resulting from the mishap.

The shipping channel remains open, with the Canadian Coast Guard directing one-way traffic