Me and my 3 children were walking the dogs. My daughter, who's actually studing stars and planets at school, was watching the night sky. Suddenly, she called me. and only for a few seconds I could see a flying object inbetween two buildings, and gone.I was able to see a round yellow light and a smaller red one. They vanished very quickly, it was very fast.I can assure it was going probably above earth - not sea, and very low altitude. Very fast and silence.It didn't seem an airplane or helicopter of any known kind.