It may have been a jet. It came from the SE sky very fast for being so far away. It had red and white blinking lights ( I saw 4-5 distinct lights). It travelled from east to west for about 10-15 seconds and then, what surprised me was the 180 degree turn, within 2 seconds; and in another ten -15 seconds disappeared. It may have been a jet, because there was a sound like a jet, but Canada doesnt have a jet like that.