NEW DELHI: Following the quick and secret execution of terrorist Ajmal Kasab in Pune on Wednesday, former cricketer Imran Khan 's party Pakistan Tehreek-e-Insaf (PTI) has demanded the hanging of Indian prisoner Sarabjit Singh in retaliation, reports Times Now. Sarabjit Singh has been convicted and sentenced to death on terrorism charges in Pakistan.

In a demonstration organized by the party in Multan, PTI leader Naeemullah Khan said, "India waited for less than a month after the final verdict by their judiciary and we are protecting the terrorists for the last eight years."

Blaming the Pakistani President Asif Ali Zardari , he said that the president was the biggest hurdle to execution of terrorists on death row in the country.

Sarabjit Singh has been on death row for over two decades. India and Sarabjit's family maintains that he is innocent who happened to stray over the international border in an ebriated state and his was a case of mistaken identity.

When contacted, Sarabjit's sister Dalbir Kaur refused to comment. She said, "Mujhe darr laga hain yaa darr nahi lag raha main kuch bhi bolna nahi chahti hoon." (I would not like to say whether I am scared or not scared for my brother).

On Imran Khan's party's stand, she said, "He is not in the government so there is no need for me to a react ... but, I'm thankful to (former interior minister) Rehman Malik."

After Kasab was hanged yesterday, former Supreme Court judge and Press Council of India chairman Markandey Katju wrote a letter to the prime minister and president of Pakistan appealing yet again for clemency for Sarabjit.

Katju had argued Sarabjit's case vis-a-vis Kasab's and stressed how both the cases are different and why Sarabjit deserves a pardon.

"You must have heard that Ajmal Kasab has been hanged in India. I wish to respectfully point out to you that this case is totally different from that of Sarabjit Singh who has been on death row in Pakistan for 21 years. About Kasab, there is no doubt about his guilt as he was caught red handed. However, there is great doubt about the guilt of Sarabjit Singh. So, the two cases are not similar," Katju said in the letter.

