Viewed bright white tic tac shaped object moving north to south for 3-5 seconds

While taking my dog on usual morning walk, i stopped to observe a group of buzzards that had gathered in a large oak tree, as they did daily. While observing the birds, the bright white object appeared against the very blue sky. It moved from north to south at a high rate of speed for approximately 3-5 seconds. As I was trying to remove my phone from my pocket to take a picture/video, it abruptly stopped and disappeared. There were no lights, sounds, or anything else noticeable about the object.