Canada's petroleum company Husky Energy submitted a preliminary report about the largest-ever oil spill in Newfoundland and Labrador and said it is “deeply sorry” for the incident.

According to local media reports, the oil and gas vcompany admitted that on November 16, there were two separate oil spills at the Sea Rose FPSO.

“The initial release occurred during the approximately 20 minutes offshore teams were troubleshooting a drop in flowline pressure,” Husky said in its website.

The the spill happened when a flowline connector failed, spilling two separate releases into the ocean, it said.

The Newfoundland’s largest-ever oil spill saw 250,000 litres leak into the ocean. The huge spill of oil, water and gas happened while Husky Energy’s SeaRose platform was preparing to restart production during a fierce storm that was, at the time, the most intense in the world, it said.

The Calgary-headquartered company submitted the report on the Nov. 16 oil spill to the Canada-Newfoundland and Labrador Offshore Petroleum Board (C-NLOPB).

However, the regulatory board that oversees the province’s offshore activities has said it’s now impossible to clean up the oil spill.

Husky Energy says it identified issues it needs to improve in the wake of the spill. It is apologizing for the incident.