In a statement here, External Affairs Ministry said, "There is no grievance or political goal so great as to justify such a cowardly act. We believe that only the firmest and most comprehensive action against all terror groups without any distinction is the only way to defeat this evil scourge."
The Ministry also said India's "prayers will remain with the families of the victims, who we hope will be granted the courage and fortitude to overcome this irreparable loss that they have just suffered."
Ten women, eight children and three security personnel were among the 61 people who have died in the attack that took place last evening when a suicide attacker detonated a powerful bomb at Wagah.
Over 100 people were injured in the incident and are being treated in different Lahore's hospitals where emergency has been declared.
The blast took place when a large number of people were returning after attending the flag lowering ceremony at the main Indo-Pak land border crossing, which is heavily guarded by the Punjab Rangers.