Both Countries nuclear powers and have fought 3 wars since 1947..
Tensions occurred over a week ago when Pakistan backed militants attacked an Indian army base and killed 18 soldiers. The Indian government this week targeted these militants with a surgical strike inside Pakistan controlled Kashimir. The war talk between two countries is very high. Today both countries are shelling each other across the border.
Pakistan and India fought a war do you think one of them will use the N-bomb?
http://edition.cnn.com/2016/10/01/asia/kashmir-tensions-evacuations/