India on Monday accused Pakistan of misusing the International Court of Justice for propaganda as the top UN court began a four-day public hearing in the case of Kulbhushan Jadhav sentenced to death by a Pakistani military court on charges of espionage.

India, during the first day of the hearing, based its case on two broad issues -- breach of Vienna Convention on consular access and the process of resolution.

"It is an unfortunate case where the life of an innocent Indian is at risk," ex-solicitor general Harish Salve, who was representing India, said.

"Pakistan's story is solely based on rhetoric and not facts," he said, adding that Jadhav's continued custody without consular access should be declared unlawful.

"There is no manner of doubt that Pakistan was using this as a propaganda tool. Pakistan was bound to grant consular access without delay,"

He said India had sent 13 reminders to Pakistan for consular access to Jadhav, but Islamabad is yet to accede.

Pakistan claims that its security forces arrested Jadhav from restive Balochistan province on March 3, 2016 after he reportedly entered from Iran.

However, India maintains that Jadhav was kidnapped from Iran where he had business interests after retiring from the Navy. Jadhav's sentencing had evoked a sharp reaction in India.

During the hearing, Salve said Pakistan filed the FIR almost a month after the arrest of Jadhav.

"In April 2016 and FIR was registered against Jadhav. In May 2016, Jadhav was interrogated, and India sent reminders for consular access across May, June, and July," Salve says.

"India reminded Pakistan for consular access — 13 reminders were sent — but to no avail," he said.

"Pakistan embarrassed to disclose charges against Jadhav," Salve said.

Pakistan did not inform Kulbhushan Jadhav of his rights, he said