African trade flows may shift further away from the US after President Donald Trump announced a slew of new tariffs, the head of Citigroup Inc.’s regional office said.Trump unveiled a revised global plan on Thursday that imposed levies as high as 30% on imports from countries including South Africa — the continent’s biggest economy — and Algeria.

Chinese and American trade negotiators concluded their two-day meeting in Stockholm without a clear path forward to avert tariffs from skyrocketing back to ultra-high levels that formed an effective blockade on trade between the world’s two largest economies.

Trump started hiking tariffs on Chinese goods shortly after his return to the White House. China ultimately responded with tariffs of its own. Tensions escalated, with tariff rates hitting the triple digits, before a trade truce in May.