Canada-based Irving Oil Ltd. confirmed a "major incident" occurred at 6:58 a.m. ET on Oct. 8 at its 320,000-barrel-per-day Saint John refinery following local reports of a fire and explosion at the facility.

The privately held oil refiner exports over half of the New Brunswick facility's production, which includes products such as gasoline, diesel, heating oil, jet fuel, propane and asphalt, to northeastern U.S. markets.

No information about the cause of the fire or extent of the damage was immediately available.

At 1:01 p.m. ET, the company tweeted that all employees and contractors working on the site had been safely accounted for but added that several contractors were being treated for non-life threatening injuries.

"As this is an active situation, we will be sharing more information as it becomes available," the company said.

Irving also owns a 75,000-bbl/d refinery in County Cork, Ireland.

The company owns 900 retail service stations in eastern Canada and the northeastern U.S. and operates product distribution terminals in eastern Canada, New England and Ireland.