"Those plotting against Pakistan will not be spared," Asif said, on Monday after the Pakistani military announced that an army court has sentenced Jadhav to death after finding him guilty of "espionage and sabotage activities" and the army chief Gen Qamar Javed Bajwa has approved his execution.
Jadhav's sentencing by Pakistani military court as per law: Khawaja Asif
Jadhav's sentencing by a Pakistani military court was according to the law, Asif told Geo TV.
He said the death sentence handed out to Jadhav should serve as a "warning to those plotting" against Pakistan". Asif said that Pakistan would use all constitutional force available against those acting against the sovereignty of the country.
"Soldiers and civilians of Pakistan have given sacrifices for this country and their sacrifices demand us to give a befitting reply to terrorists and those who aid and facilitate them," he said.
The defence minister further said that Jadhav's "confession" was a public document and if India raises the issue of his death sentence, Islamabad will reply to New Delhi.
Jadhav came (to Pakistan) with the approval of the Indian government," he claimed and said there is no doubt that India was "fueling terrorism in Pakistan."
Replying to a question on dealing the issue on diplomatic and political fronts, he said that Pakistan would present the issue on every international forum.
According to Asif, the world had acknowledged Pakistan's struggle against terrorism and the country was dealing with this "menace" from both the "eastern and western front".
Pakistan sentenced Jadhav to death for carrying out espionage and sabotage activities in Balochistan and Karachi, the military's media wing Inter-Services Public Relations (ISPR) said in a statement.
According to ISPR, Jadhav alias Hussein Mubarak Patel was arrested on March 3, 2016 from Mashkel area of Balochistan for his "involvement in espionage and sabotage actives" in
Pakistan's restive Balochistan province and Karachi city. Reacting strongly, Foreign Secretary S Jaishankar in New Delhi summoned Pakistan High Commissioner to India Abdul Basit and gave a demarche, which said the proceedings that have led to the sentence against Jadhav are "farcical in the absence of any credible evidence" against him.
Kulbhushan Jadhav's family flat in Mumbai found locked:
Meanwhile, as the news of the sentencing of Indian national Kulbhushan Jadhav to death by a Pakistan
military court surfaced, people flocked to his family's apartment in the city but found it to be locked.
It was later revealed that Jadhav's family members had moved to Pune and no one was staying in the flat.
"The family has moved to Pune and no one lives here. The flat is empty and is generally locked," a neighbour said.
A dozen police personnel reached the building in suburban Powai soon after the news of the 46-year-old's death sentence spread. A large number of media persons also rushed to the spot. Locals too gathered outside the residential complex.
However, the managing committee members of the housing society prevented people from going inside the building.
Jadhav's father Sudhir is a former assistant commissioner of police.
The Indian government has maintained that proceedings leading to the sentence against Jadhav are "farcical in the absence of any credible evidence" against him.
Jadhav kidnapped last year from Iran: Foreign Secretary S Jaishankar
Foreign Secretary S Jaishankar said Jadhav was kidnapped last year from Iran and his subsequent presence in Pakistan has never been "explained credibly".
India had acknowledged that Jadhav had served with the navy, but denied that he had any connection with the government.
(With inputs from PTI)