India, July 30 -- The Indian rupee weakened against the U.S. dollar in the European session on Tuesday, after U.S. President Donald Trump indicates an increased import duty rate for India.

Trump has threatened India with tariffs as high as 25 percent but cautioned the final levy had still not been finalized.

Separately, media reports said, citing sources familiar with the matter that Trump has expressed his desire to speak with Prime Minister Narendra Modi before giving the final nod to the long-anticipated India-U.S. trade agreement.

Mr. Modi is currently engaged in the Monsoon session of Parliament, and the two governments are coordinating the logistics of a potential call, it was said.

Investors are anticipating the Federal Reserve's...