The spokesperson didn't offer any details about the shutdown, VentureBeat reports, though Reuters said it was "part of a broader push to streamline the company's hardware efforts." A modular design complicates the hardware production process since Google would not only have to manufacture a bunch of smartphones but also all of the detachable cameras, battery packs, speakers and other accessories that would make each phone unique.
Project Ara has been in the works for three years at Google and in August of last year its public reveal was delayed to 2016.
However, Project Ara may live on. Reuters says that Google might still license out the project's technology to other manufacturers.