I saw 3 consecutive object disappearing in the sky at same nearby location I was roaming on my terrace and I saw star-like moving object that gradually became small, red colour and disappear. Within a few minutes I saw another similar-looking  object a little distance away coming from opposite of first one and disappearing with red colour at nearly the same location. Within 5-6 minutes, I saw another similar object that soon disappeared. The object was moving from a lower altitude to a higher one. What was it?
You may have seen some artificial satellites passing into the Earth's shadow.
If so, Heavens-Above could help you identify them.
The reddish color just before disappearance would be due to the atmosphere scattering shorter wavelengths of sunlight.