CALGARY, April 8 (Reuters) -

* Canada's Suncor Energy ( SU ) confirmed on Wednesday that

an uncontrolled steam leak occurred from a well at its Firebag

oil sands site in northern Alberta last week.

* A Suncor spokesperson said the well issue is now resolved

and production at the site is unaffected. Firebag produces up to

215,000 barrels per day, according to Suncor's website.

* Suncor said the release of steam resulted in "mist"

falling onto the associated well pad and migrating onto property

outside of the Firebag site.

* The company did not say what caused the incident or how

long clean-up efforts will take.

* The Alberta Energy Regulator said on Wednesday it is on

site at Firebag working to ensure compliance with regulations.

* Firebag is an in situ oil sands operation, meaning steam

is used to loosen the heavy bitumen so that it can be pumped to

the surface via wells.

* Last year, Suncor rival Cenovus also reported an

uncontrolled steam release. In Cenovus' case, the incident

forced the company to temporarily shut in production at its Rush

Lake 2 facility in Saskatchewan.