A large ship carrying chemical products ran aground during its passage through the St. Lawrence Seaway early Friday morning, backing up maritime traffic as tugboats tried to dislodge it. 

The Chem Hydra got stuck shortly after 12:30 a.m. Friday near the Sainte-Catherine Lock on Montreal's South Shore. 

By 7 p.m., the tanker had been dislodged and moored, or parked, near the Lock. 

Officials say the ship got stuck after it collided with the Seaway's natural bottom. Its engine is said to have failed. 

HV Chem Hydra

Details of the ship's contents are not known, but a Seaway spokesperson told CTV the chemicals it was carrying have not spilled. 

“There was no ingress of water and no spillage of any pollution into the environment,” said spokesperson Nicolas Poirier-Quesnel.

The ship was heading toward the Great Lakes. All crew members were able to safely disembark.