ANCHORAGE, Alaska (AP) -- BP announced Tuesday it is selling its interests in four North Slope fields to Hilcorp.

BP is selling all its interests in the Endicott and Northstar fields and half its interests in the Liberty and Milne Point fields.

These fields produce about 20,000 barrels of oil a day, less than 15% of BP's net North Slope production. The Alyeska Pipeline Service Co. says there has been an average of nearly 580,000 barrels a day flowing through the trans-Alaska pipeline from the North Slope this year.

The company says about 250 employees working these fields should learn more about the status of their jobs soon.

BP says in a release the sale will allow it to concentrate on Prudhoe Bay field and help advance an Alaska liquefied natural gas project.