Dalbir Kaur, sister of alleged Indian spy Sarabjit Singh, Tuesday said she would meet External Affairs Minister Natwar Singh and urge him to raise the issue of her brother's release with the Pakistani leadership during his visit to Islamabad next month.

Pakistan Supreme Court today upheld Sarabjit's death sentence in another bomb blast case. "I am going to New Delhi tomorrow to meet the External Affairs Minister K Natwar Singh, who is going to Pakistan next month, to raise the issue of Sarabjit's release during the talks with his counterpart," Dalbir Kaur told PTI by phone.

She said Sarabjit's lawyer Rana Abdul Hamid would file a review petition in the Pakistan Supreme Court Wednesday pleading to reconsider the capital punishment awarded to him.

Dalbir said Punjab Chief Minister Amarinder Singh had assured her that he would talk to Parvez Elahi his counterpart in Pakistan's Punjab province to help Sarabjit.

Expressing gratitude to Pakistan President Pervez Musharraf [Images] for indicating that he would be sympathetic towards Sarabjit's case, she said Natwar Singh should raise the issue during his Pakistan visit.

On Musharraf's statement that it was upto the kin of victims of the blasts allegedly engineered by Sarabjit, Dalbir claimed since Salim Shaukat, whose father was killed in the blast had already spoken in favour of pardon, there should be no problem to free her brother.

"Moreover, it was a clear cut case of mistaken identity as Sarabjit is not Manjit Singh, against whom the allegations were made," she said.

Complete coverage: The Sarabjit saga