As I was on my way home from work Friday night driving through Kent on Green River road I noticed an object in the sky flying really low, no noise and moving very smooth, I can’t describe on how perfectly it flew through the sky unlike a plane or helicopter. I pulled over and watched in make it way south but what I noticed was that it had 3 triangular red light blinking lights. I thought no way that could be a plane because they don’t fly that low and living here for the past 10 years near the Seatac airport I’ve never seen anything that low and going against air traffic. I also noticed an object with 4 white square shaped lights flying low going East and again not with air traffic. Minutes later the noticed what seemed to be a airplane, possibly a military airplane give pursuit towards the red triangular object. Unsure what is could have been but I’ve become familiar with all sort of airplanes flying through going to Seatac airport but this time was unlike no other. I hope others noticed but thank you for reading my report and looking forward to hearing back, thank you!