Prime Minister Manmohan Singh and Pakistan President Asif Ali Zardari on Thursday began a key meeting in Tehran, amid clear indications that terrorism will be the prime focus of the Indian side.
The meeting took place on the sidelines of the 16th NAM summit and is the second meeting between the two leaders this year.
The meeting comes a day after the Indian Supreme Court upheld Ajmal Kasab's death sentence in the Mumbai terror attack case, strengthening India's case for action against others involved in the 26/11 strike.
Singh had last met Zardari in New Delhi in April this year when the Pakistani President made a private visit to India to pray at the Sufi shrine in Ajmer.
Indian officials have said that terror will be high on the agenda and India's continuing concerns over lack of action against those in Pakistan believed to have been actively involved in 2008 Mumbai attack will be flagged by Singh.