In May 1998 India and Pakistan each exploded several nuclear devices underground . This heightened concerns regarding an arms race between them , with Pakistan involving the People 's Republic of China , an acknowledged nuclear weapons state . Both countries are opposed to the NPT as it stands , and India has consistently attacked the Treaty since its inception in 1970 labeling it as a lopsided treaty in favor of the nuclear powers
In May 1998 India
Pokhran-II
Nuclear proliferation