Saucer and tall alien who appeared in human form

I silver white disk/saucer approx 35 feet high and 45 feet wide., out side the craft stood a very tall lean male.  He appeared to be 7', wearing a silver/grey military type uniform.  He said, "return to your home, do not come back out til morning."  He communicated with his mind.  I returned to my home.  I could hear sirens coming to the location where the saucer and man stood.
This male appeared as a male not unlike that of a human, he was firm in his request and compelling, though he did not present himself as threatening.  There was no report on the news of this sighting.  
Two to three hours later the police did come to our door and asked my mother to keep all of us indoors that night.