Amazon.com launched AmazonFresh Pickup service from two locations in Seattle, as the online giant attempts to crack into the multi-billion dollar grocery market dominated by retail giants such as Walmart.

AmazonFresh Pickup, currently open only to employees, allows users enrolled in its Prime service, to drive in and pick up groceries from the pick up locations.

Amazon Prime members can place the order online and choose a time for the pick up, the company said on Tuesday. The company will keep the order bagged.

The company also delivers groceries to homes under its AmazonFresh service.

Amazon also has a physical book store in Seattle, as well as pop-ups at malls where it displays Amazon devices such as the Kindle.

Correction (March 28, 2017: 1:10 pm): An earlier version of this article incorrectly said that the new service would be handled from an Amazon grocery store and that such a store had already opened. In fact, Amazon’s planned grocery store in Seattle has not opened.