A highway loops around the southeast end of Mildred Lake at a Syncrude facility as seen from a helicopter tour of the oil sands near Fort McMurray, Alta., on July 10, 2012.

There are no reports of injuries after an early morning explosion at an oilsands plant in northern Alberta owned by Syncrude Canada.

Spokesman Will Gibson says crews quickly extinguished the fire at the site which deals mostly with sulphur.

Nobody was injured and the company has accounted for all its workers at the site, Gibson said. “We’re being very cautious because the safety of the people on our site is our top priority”, Gibson told CTV News.

Syncrude expects to release more information later Saturday, Gibson said.

Bartlett said in his email that there have been no impacts to wildlife or water bodies.

An investigation is underway to find the cause of the blaze, but there doesn’t appear to be any impacts to air quality in the area.

According to Gibson, it’s too early to speculate on any impact to production. “There is an area in our upgrading complex that is affected… but our operations are continuing in other areas of our upgrader and our operation as a whole”.