Why did sinkholes emerge in Pakistan? Here is a video.

Why did the sinkhole emerge in Pakistan? Is this because of the heavy exploitation of groundwater?

What could be the solution?

Reference   


In pictures: Chaos as rain continues to lash Lahore   
NDMA sends out monsoon alert, expects more urban flooding in Lahore, Rawalpindi  
Sinkhole emerges near GPO on Mall Road  
Those responsible for Lahore sinkhole will be punished: Interim transport minister
I was about to ask a question whether this should be classified as a sinkhole or not. This is because this so-called 'sinkhole' is not entirely because of a natural process. It seems that it was the underground GPO Station (or the tunnel) of Orange Line Metro Train Station that collapsed.

I can't seem to find an article that specifically mentions this. One news article I found isn't exactly very clear about it, but suggests this to be the case.

I think you can blame the 'sinkhole' (or collapse) or the failure of the underground structure. One of your source's title "Those responsible for Lahore sinkhole will be punished" also seems to suggest that it has only man-made causes, and not natural.

Further sources:
Punjab Mass Transit Authority - Orange Line Metro

P.S. I live here. :)