White hovering sphere becomes three colored spheres

I was about 13, we were on an extended field trip traveling though Arizona.  We were in two vans, driving at night on a two lane highway.  A big, very bright, glowing sphere zoomed in front and above of us, maybe a couple hundred feet.  It separated into three spheres, one red, one white, one blue.  They “flew,” but more zoomed around one another for about two minutes.  They were very fast and silent.  They then departed, at an unimaginable speed.
Other cars were all stopped along the highway, we all saw it.  The radio MC was talking about it.  Then he said he was told not to talk about it anymore.
Source of the report elects to remain anonymous; provides little contact information.  PD