Indian Prime Minister Narendra Modi and Brazil's President Luiz Inacio Lula da Silva spoke by phone on Thursday, their offices said, discussing a broad range of topics that included tariffs imposed by the United States on goods from both countries.

Experts warn that such aggressive tariff policies risk damaging decades of diplomatic progress between the U.S. and important emerging markets.

The revised duty regime, which begins on August 7, affects 69 countries and was unveiled just hours before the initial deadline of 12:01 am EDT on Friday