Google is working on expanding its Google Shopping Express service nationwide, according to a new report.

Google Shopping Express is Google’s Amazon Prime competitor, which provides same-day delivery service for products ordered online. It began with a small pilot in San Francisco early last year before being expanded to more people in that area later in the year. It eventually launched in the San Jose area, and in May, it expanded into two new areas – Manhattan and West Los Angeles. Last month, Google added an overnight delivery option in some areas.

Jason Del Rey at Re/code reports:

A source familiar with the company’s plans says senior Google execs have set aside as much as $500 million to expand the service nationwide. Google declined to comment on the size of the investment but made no secret of its ambition.

“You can very much expect that we are putting a lot of money into this and we’re excited and willing to sustain that investment over time as this gets going,” said Tom Fallows, head of Google Shopping Express.

Of course Google would want to expand the service across the country, but this would seem to suggest that its early locations have done well, making it worth Google’s money to do so.

No word yet on whether or not Google intends to use drones to compete with Amazon on deliveries, but it did buy a bunch of robot companies. It also, of course, has driverless cars.

Image via Google