3 lights moving north

Outside enjoying a cigarette.  Great visibility of the stars.  I noticed what looked like a start moving north east.  It appeared to be very high in the sky and a similar brightness to the other stars and size.  About 20 seconds past as it travelled over head and eventually out of my sight.  2 minutes later a slightly dimmer light was seen in the same place in the sky heading in a more north direction.  30 seconds after witnessing a second light a third light was seen.  This one was brighter and appeared to be lower in altitude.  Was also heading north.  As it travelled it blocked out the stars above it.
 Have never seen anything like this.  Could be satellites maybe im not sure.  I have seen shooting stars before and what appears to be other lights moving very fast but never something like this.  Thought I would report