Iran Press/ America: All the eight workers, some with serious injuries, were sent to hospital, the Royal Canadian Mounted Police said in a news release published Friday.
"The cause of the explosion remains under investigation," said the news release.
Multiple media reports citing witnesses said the explosion took place shortly after 4:00 p.m. local time (1830 GMT) at the refinery based in the town of Come By Chance.
Braya Renewable Fuels, the company operating the refinery, confirmed the explosion in a statement and said the situation has been contained.
"The authorities have been notified and we will cooperate fully with their investigation," said the statement.
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