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.

The Stockholm meeting, following similar talks in Geneva and London, is set to extend a 90-day pause on those tariffs. During the hiatus, U.S. tariffs have been lowered to 30% on Chinese goods, and China set a 10% tariff on U.S. products.

Officials are meeting in Sweden for their third round of talks in as many months, ahead of an Aug. 12 deadline, to try to avoid a flare-up in trade tensions.