History of strife
Although ties between New Delhi and Islamabad have improved since tensions flared in the aftermath of the 2008 terrorist attacks in Mumbai, the two deaths put a fresh strain on their delicate relations.
India and Pakistan have fought several wars since their independence from British colonial rule more than 65 years ago.
Though some may assume so, it is not yet clear if Ranjay's killing was revenge for Singh's. Many men have died of violence in jails.