New Delhi: Indian Foreign ministry spokesman Vikas Swarup said foreign secretary S. Jaishankar had written to his Pakistani counterpart urging an acceleration of the trial on 6 September.

It was delivered to the Pakistani authorities by the Indian high commissioner Gautam Bambawale in Islamabad on 9 September, Swarup said.

Pakistan is yet to respond to India’s letter.

The reason for sending the missive “was the total delay in bringing to book" those who planned the Mumbai attack, Swarup said, noting that the attack took place as long as eight years ago.

“In order to bring the guilty to book, our foreign secretary has recently written to his counterpart in Pakistan suggesting ways in which the trial could be expedited by cooperation through the legal channel," Swarup said.

“It also shows India’s continuing focus on terrorism" as well as that India “is prepared to offer suggestions" on how the trial can be speeded up, Swarup said.

He did not divulge what were the suggestions that India had offered to Pakistan.

India blames the Pakistan-based Lashkar e Toiba militant group for planning and executing the attacks in which 166 people were killed when 10 militants, who had set sail from the southern Pakistan port city of Karachi, landed in Mumbai on the night of 26 November 2008. The militants then targeted multiple locations in Mumbai till the morning of 29 November 2008 when all but one was shot dead by Indian security forces.

In other remarks, Swarup said that India would take up the issue of human rights violations in the south western Pakistani province of Balochistan as long as repression continues there.

This comes a day after India spoke up about human rights violations in Balochistan at the 33rd Session of the UNHRC in Geneva.

Prime Minister Narendra Modi had in a meeting with members of Indian political parties on 12 August said that India would highlight Pakistan’s human rights violations in Balochistan where the Pakistan army has been trying to douse an insurgency using artillery and aerial bombings, according to news reports.

Modi had then said that Indian missions abroad would be tasked with highlighting human rights violations in Balochistan.

In his Independence Day speech on 15 August, he again referred to the subject saying that people of Balochistan, and other regions of like Gilgit had sent messages thanking him for focussing attention on their cause.

Pakistan has long accused India of supporting the Baloch insurgency—a charge India denies and dismisses as a cover for Islamabad’s own record in backing the Kashmir insurgency.