The close confidant of Chancellor Angela Merkel reported a "very positive impression" of US Secretary of Commerce Wilbur Ross, who he met earlier this week in Washington trip for last-minute talks.
The meeting of the world's leading economies in Buenos Aires comes days before US tariffs on steel and aluminum are due to come into force on Friday for all countries except Canada and Mexico.
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Sweden's embassy in Pyongyang also represents US, Canadian and Australian diplomatic interests in North Korea, with the country playing a key role in liaising diplomatic talks.
The Antonov plane was taking off after refuelling in an airport at Yakutsk in Siberia when its cargo door flew open -- and out tumbled nearly 200 bars from the Kupol gold mine in the remote Chukotka region, investigators said.
The US supply increase is expected to come as the Organization for Petroleum Exporting Countries, dominated by oil giant Saudi Arabia, works with Russia to slash output after prices for crude plummeted to around $30 per barrel in 2016 from over $100 two years earlier.
Exemption from US metal tariffs may depend on quickly wrapping up free-trade deal
Bodies of 10 people recovered so far, one still missing
All 11 people on board reportedly died in the crash
The duties of 25 percent on imported steel and 10 percent on aluminum have stung the EU, along with other major partners including Japan, and European Trade Commissioner Cecilia Malmstroem said earlier Washington had failed to clarify how its allies could be spared.
French economy minister will assess affect on industries with EU partners and then respond
Canada says no special treatment for US if it wants back into pact
New tariff order carves out exceptions for Canada, Mexico and possibly other countries
Pressure on Trump mounts from politicians, including Republicans
Wang Yi made the comments in an interview with China Business Journal on the sidelines of the Chinese People's Political Consultative Conference, a top advisory body opening its annual national session in Beijing over the weekend.
Police say attack targets Prime Ministry, roundabout near UN building
World-Renowned Author Schultz says 'Turkey grabbed my imagination as a young girl'
Index contracts because of Trump tariff announcement, worries of global trade war