New Delhi, Feb. 10 -- Iranian Foreign Minister Abbas Araghchi on Saturday said that he was optimistic negotiations with the United States could restart in the near future, while again underscoring Iran's non-negotiable positions and cautioning Washington against any military action.

The discussions on Friday between the long-time adversaries took place against the backdrop of a significant US military buildup in the region, following Iran's harsh response to protests that erupted in late December over economic hardships.

On Saturday, Araghchi cautioned that Iran would respond to any US attack by striking American military installations in the Gulf, saying such retaliation would focus on regional bases rather than the United States itsel...