"The government of India attaches highest importance to addressing all humanitarian matters, including early and full consular access to all Indian nationals in Pakistan's custody, including Jadhav and Ansari and secure their early release and repatriation," it said.

Jadhav is in Pakistan's custody after it claimed to have arrested him last year from the restive Baluchistan region and alleged that he was involved in terror activities.

However, India has been maintaining that the former Navy official was kidnapped from Iran where he had legal business interest.

India has also moved the International Court of Justice against the death sentence given to Jadhav by a Pakistani army court. The court has stayed the execution pending a final verdict by it.