Leader of the Opposition in Rajya Sabha Arun Jaitley said the brutal killing of the Indian personnel was intended to "sour the environment" and disturb relations between the two countries. Pakistan should be "named and shamed" at the international fora, he said.
"Since Pakistan is choosing the brutality of the attack, the Government of India must realise that there is a need to draw the red line," Jaitley said.
Leader of the Opposition in Lok Sabha Sushma Swaraj telephoned National Security Advisor Shivshankar Menon and emphasised on the need to take the issue seriously.
The main opposition said in the face of Pakistan denying involvement of its troops, all evidence must be collected, the platoons involved identified and these facts be presented to the international community.
Jaitley asked the government to "clearly define the dos and don'ts" in relations with the neighbouring nation.
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BJP's Chief Spokesperson Ravi Shankar Prasad what the Pakistan army has done is "inhuman and barbaric".
"This is a part of a pattern. There is firing and attack along the ceasefire line to give cover to the terrorists to come in," Prasad said.
The party said Pakistan has not acted on the dossiers sent by India against the 26/11 attack accused living there.
"Pakistan has kept on raising technical objections on the issue...In effect it is misleading India...A bigger question is--what is the fundamental premise of engagement with Pakistan?" Prasad said.
He said that the January 4, 2004 accord signed by then Prime Minister Atal Bihari Vajpayee and Pakistan President Pervez Musharraf at that time should be enforced. Islamabad had then given the assurance that its soil will not be used for sponsoring terrorism against India.