In tweets this morning, External Affairs Minister Sushma Swaraj tore into her Pakistani counterpart Sartaj Aziz for "not showing the courtesy to acknowledge" her letter on a visa for the mother of Kulbhushan Jadhav, the Indian sentenced to death in Pakistan.

Swaraj tweeted that she wrote a "personal letter" to Aziz. "However, Aziz has not shown the courtesy even to acknowledge my letter," she posted.

"I wrote a personal letter to Mr.Sartaj Aziz for the grant of her visa to Pakistan, Sushma Swaraj said.

Swaraj also rejected a charge that a Pakistani cancer patient had been denied a medical visa for her treatment in India. 25-year-old Faiza Tanveer, who has an aggressive tumour in her mouth, alleged that she had applied for a medical visa to India but her request was rejected. According to her family, the reason given was "deteriorating ties".

The Union minister emphatically denied it, saying Aziz had not given a recommendation letter needed for Tanveer's visa.

"I have my sympathies for all Pakistan nationals seeking medical visa for their treatment in India. I am sure Sartaj Aziz also has consideration for the nationals of his country. All that we require is his recommendation for the grant of medical visa to Pakistan nationals," she tweeted.