New information has been released about what caused the Michipicoten to begin taking on water this past weekend on Lake Superior.

The Michipicoten, a nearly 700-foot-long ship, began to take on water Saturday morning, requiring assistance from the United States Coast Guard to help navigate the ship to a port in Thunder Bay, Ontario as it took on water.

Now with the ship safely docked, Coast Guard investigators report they didn’t find any evidence of a collision, as was previously reported. They now believe the incident began due to a structural failure.

This reported failure caused a nearly 13-foot-long, quarter inch-wide crack to form at the front of the ship, which likely led to the vessel taking on water.

The Michipicoten is currently undergoing repairs and evaluation.