Prime Minister Narendra Modi is scheduled to meet Iranian President Hassan Rouhani on the sidelines of the United Nations General Assembly (UNGA) session in New York on Thursday.

The meeting comes soon after PM Modi met US President Donald Trump twice -- once during the 'Howdy, Modi' event on Sunday and then for a bilateral meeting in New York the next day.

While addressing an event held at the UNGA assembly on Tuesday, Donald Trump tore into Iran labelling it as one of the "greatest security threats facing peace-loving nations."

Donald Trump also urged other countries to not "subsidise Iran's bloodlust".

Donald Trump had blamed Iran for attacks on Saudi oil facilities this month. "As long as Iran's menacing behaviour continues, sanctions will not be lifted, they will be tightened," Donald Trump said at the UN on Tuesday.

Tensions between Iran and the US escalated over the past few months after Donald Trump pulled out from the Iran nuclear deal and reinstated tougher sanctions on Tehran.

In a reply to the United States, Iran decided to rule out any kind of bilateral talks with the US unless it "returns" to the 2015 Iran nuclear deal that Donal Trump abandoned last year and eases the severe economic sanctions that he imposed on the Islamic Republic, a Reuters report said.

In an interview, Rouhani had said, "The United States must lift economic pressures that made it difficult for his country to procure even basic medicines."

President Hassan Rouhani on Wednesday ruled out negotiations with the United States and said that he was not interested in a "memento photo" with Donald Trump.

Donald Trump might have fuelled tensions between the US and Iran, but he has readily extended his help to douse fire between India and Pakistan over Kashmir dispute.

In conversation with Pakistan Prime Minister Imran Khan, Donald Trump, for the second time had offered mediation between India and Pakistan by taking up the role of an arbitrator himself.