Early morning on March 25th, I was driving my mother from Tucson, Az to Phoenix, Az, to the airport. It was a beautiful clear morning, around 7:30 am. We were talking most of the way. About a half hour outside of Phoenix, something caught my eye to the east of me. Two dark objects were in the sky fairly close to each other. At first I thought they were just hanging in the sky. I pointed them out to my Mother and we watched them until we could no longer see them. At first they were a few hundred feet apart. Then they started coming closer together. Kind of floating down together, but sort of straight down. Very slowly. like they were floating down. They were definitely round, but not flat. No dome on the top, more like a slightly smaller round than the rest. Dark color, no shininess at all. I was travelling on I-10 and looking to the east. There were some structures out there, maybe a tiny little village. I don't really know what's out there. A lot of empty land as well. Flat. We did not see them land, but we assumed they did.We were quite far from this area, but the objects seemed big, so they must have been much larger up close. I really have no idea what they were! They could have been a new design of a blimp?? Lol. But, both my Mother and I were a little unnerved as we see a lot of hot air balloons, blimps, etc... in Arizona!