WASHINGTON (Reuters) -U.S. President Donald Trump said he plans to unveil reciprocal tariffs on Thursday but gave no details about his latest tariff plan, which could take aim at every country that charges duties on U.S. imports.

"Today is the big one: reciprocal tariffs," Trump wrote on his social media platform.

It was not immediately clear what time Trump's tariff plan would be unveiled. On Wednesday, Trump indicated it could happen Thursday morning. The White House had earlier told reporters it would happen before Indian Prime Minister Narendra Modi's White House visit. Modi is scheduled to arrive at 4 p.m. (1900 GMT).

The Republican president's latest round of market-rattling tariffs has ratcheted up fears of a widening global trade war and threatened to accelerate U.S. inflation.

Trump, who took office Jan. 20, has already announced tariffs on all steel and aluminum imports beginning on March 12, imposed 10% tariffs on goods from China, and imposed a 30-day hold on tariffs on goods from neighboring Canada and Mexico.