SEOUL/WASHINGTON - US President Donald Trump and South Korea's new president Lee Jae-myung agreed to work toward a swift tariff deal in their first phone call since Lee was elected this week, Lee's office said on Friday.

Trump has imposed tariffs on South Korea, a long time ally with which it has a bilateral free trade deal, and pressed it to pay more for the 28,500 US troops stationed there.

Lee, a liberal, was elected on June 3 after former conservative leader, Yoon Suk-yeol, was impeached and ousted.

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"The two presidents agreed to make an effort to reach a satisfactory agreement on tariff consultations as soon as possible that both countries can be satisfied with," Lee's office said in a statement.

"To this end, they decided to encourage working-level negotiations to yield tangible results."

Trump invited Lee to a summit in the US and they plan to meet soon, according to a White House official. Analysts say the first opportunity for the two to meet could be at a G7 summit in Canada in mid-June.

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Lee's office said the two leaders also discussed the assassination attempts they both experienced last year as well as their enthusiasm for golf.

Lee underwent surgery after he was stabbed in the neck by a man in January last year, while Trump was wounded in the ear by a bullet fired by a would-be assassin in July.

South Korea agreed in late April to craft a "July package" scrapping levies before the 90-day pause on Trump's reciprocal tariffs is lifted, but progress was disrupted by the change of governments in Seoul.

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Lee said on the eve of the elections that "the most pressing matter is trade negotiations with the United States." Lee's camp has said, however, that they intend to seek more time to negotiate on trade with Trump.