I was drving in the District of KULLU in the state of Himachal Pradesh in India.I observed the pitch black night sky, when i noticed 3 bright stars in a line and a 4th star below the first of the 3 stars. I thought it to be a constellation and focussed attentively on it as I saw the 4th lone star brighten up more than any of its companions and then they all (4 in total) faded in a split of a second.The color of light was yellow(pale).I am sure it was not a star but flying objects montiored by some intelligent source.