I took the dogs outside for a wee at approximately 2:30am. they were playing in the garden and suddenly they stopped dead and laid on their back looking at the sky, almost as though they were frozen. i tried to call them to me and they wouldn't move. i then looked up at sky and seen 2 strange looking things in the sky, i then seen flashing lights coming from these objects and a low humming noise... there was no one else about and there were no aircraft about. after roughly 3 minutes they flew off and the dogs came to me as though nothing had happened.