Orochimama - Chapter 17

... parate way. She had people that would be wondering what was taking her so long back in Mist very soon if she didn't get back quickly. I was then in Wave alone, all my soldiers had retreated with our stolen goods, for now. We'd wait until Konoha finished sticking their nose into the area before reopening everything here.

I needed to get out of Wave too. I had no question in my mind that Kakashi had managed to somehow get a message off, even if he had to pay for a courier to run there hims ...