Rajnath Singh's remarks came almost a week after the Indian Army carried out a "retaliatory action" against Pakistani troops, killing seven of their soldiers and injuring four others along the Line of Control in Jammu and Kashmir's Poonch district.
"A few months ago, Pakistan, in an act of cowardice, attacked and martyred 17 of our jawans. Prime Minister Narendra Modi consulted all of us on this serious issue, and the Indian Army entered the Pakistani area and killed the militants," Mr Singh said at a public meeting in Lucknow.
"India's image in the world has become that of a strong nation and we have given a strong message to the world that we can attack our enemies not only on our soil, but also in their territory," he said.
Rajnath Singh said India wants to maintain a friendly relationship with its neighbour. "But Pakistan is not mending its ways," he said.
Rajnath Singh was addressing the meeting of 'Bharatiya Railway Maal Godaam Shramik Sangh' today.
He said he would take up the issues and problems of the railway labourers with higher authorities.