Alberta officials are investigating after a pipeline leaked causing crude oil to spill at a pumping station near Elk Lake, northeast of Edmonton.

The spill at Enbridge Inc.'s Athabasca pipeline happened Monday. An estimated 230,000 litres of heavy crude oil leaked, according to the company.

However, Darin Barter of the province's Energy Resources Conservation Board (ERCB) said the amount of oil spilled, and the cause, have not yet been confirmed.

"It's too early to really tell what the cause will be because we are in frankly a messy situation with oil and at this point the priority is to get it off the ground," Barter told CTV Edmonton in an interview.

Enbridge confirmed Tuesday the leak occurred at the pumping station about 24 kilometres southeast of Elk Point, Alberta.

In a release, the oil company said the pipeline had been shut down and the pumping station had been isolated.

"No waterways are impacted and cleanup is underway," the statement said.

There were no injuries or evacuations as a result of the oil leak. The ERCB is continuing to investigate the leak.

Earlier this month the oil company Plains Midstream Canada announced that 475,000 litres of oil had spilled into Alberta's Red Deer River and a water reservoir downstream of the leak.

And in May, Calgary-based Pace Oil and Gas announced a spill after it was spotted during a flyover in a remote muskeg area of northwestern Alberta, about 20 kilometres southeast of Rainbow Lake.

The spill affected an area about 500 metres long by 200 metres wide, said Fred Woods, president and CEO of Pace Oil and Gas Ltd.