I asked the gatekeeper why the supernatural things cannot enter the temple to which he mentioned some ceremony done by some saints long ago. If you go there, you can see a boundary around the Hanuman Temple in which we were sitting. He told us that as long as we stay inside the boundary we are good. The guard got drunk and slept on the floor of the temple.
Now It was around 12:45 (when there was a power cut). We heard as someone is running up outside the temple and entering in the fort
And the sound got louder and we looked outside the window to see what's happening but nothing was visible. And suddenly the sounds coming from behind the temple like someone is running around the temple. Now we are terrified first we thought maybe its a dog or other animal but we can't see anything and very next second someone throws a stone on us, We shouted for the help but the guard was unconscious and we knew that we are in a trouble, a big trouble. We don't know what is happening, but we are crying for help and nobody can hear us and suddenly the guard start mumbling something we can't understand the words exactly but the situation getting worse so we recited Hanuman Chalisa, held each other's hand, cried, shouted for help, but the sounds never stopped. All the adventure was gone. It was just fear. Somehow as the clock struck 6:15, we heard a pujari doing something in the temple (cleaning the floor and doing his daily chores). We run for life and without looking back we came back to Delhi and don't want to go to that place again in fact not even near to that place.
So now its been 2 years but still we never understand what was that, those running foot, stones. But when we think about it calmly then we thought that it can be a robber or thief who is trying to injure us. But the place and situation are not helping us to think without panicking. So that's it.