Amazon is winding down its Prime Air drone delivery program in Lockeford, California — an early testing zone for a service that allowed residents to order products weighing up to five pounds and get them delivered to their location via drone in 30 minutes.

In the same press release, Amazon also announced that the company is launching a new Prime Air location in Tolleson, Arizona. The new location is expected to provide “same-day” deliveries to residents in the Phoenix West Valley metro area. Amazon expects to begin operations in Arizona starting later this year. Employees at the closing Lockeford location will be offered “opportunities at other sites.”

According to Amazon spokesperson Av Zammit, the Tolleson location will be the first time the company deploys drones directly from its same-day delivery site, integrating drones into the Amazon delivery network. Amazon has a goal of delivering 500 million packages per year by drone by 2030.

While the press release doesn’t provide a clear reason as to why the Lockeford location, which opened for business in 2022, is closing, Zammit says Amazon is “moving into the next stage of the program, locating within existing Amazon delivery sites, and expanding to more populated areas.”

Amazon states it will continue Prime Air operations in College Station, Texas, and plans to open new locations in 2025. Meanwhile, the company’s latest MK30 drone — which is less heavy and can fly through light rain — is still undergoing testing, according to the press release.

The new drone was revealed in November 2022, after the company reportedly struggled with other models that sometimes crashed and burned in testing. Zammit notes that Amazon tests drones beyond their limits, expects these types of events to occur, and that safety improves after learning from each flight. The MK30 was projected for use in operations this year, and Zammit confirms it will come into service “later this year.”

Amazon had an early head start to its drone delivery service compared to its competitors but has fallen behind over the years. In 2013, then-CEO Jeff Bezos said drone deliveries were four to five years away.

The company previously aimed to make 10,000 drone deliveries by the end of 2023; it was last reported that only 100 deliveries were made by the middle of 2023. Zammit says the company made “thousands” of deliveries last year. Meanwhile, rival delivery company Zipline has reported completing 1 million deliveries as of April 19th.

Update April 23rd, 10:37AM ET: Included new context provided by Amazon.