The Indian side keep doing this to divert Pakistan attention.
Pakistan is the only country which calls nuclear arsenals as assets and still they think, it will protect them. Today the country is more insecure than when exploded the first time. Keep on adding more bombs to become the fourth largest in terms of number of bombs till the last grass is consumed.
To quote from an article by Mr. Kunwar Idris on the 11th Anniversary of BUM in Dawn news:
" nuclear weapons cannot save Pakistan from a collapse triggered by internal strife or from defeat if invaded by India or, much less likely, by Israel. In any case, America will be on the scene as world policeman."