Capsule/Cylinder shaped object.

I was talking outside with someone and noticed a object with a shadow underneath moving east before turning quickly northeast. It originated from the west and I only noticed it when it came from behind a tall building. It almost moved like a submarine moving through water. It seemed like a capsule or a plane without wings or a rutter. I noticed no sound. Other people were congregating outside at the time but most had there backs turned. I was the only one to actually notice. I told my friend but he was not too serious about it. No clouds were in the area at the time although the area is known for heavy air traffic.