US President Donald Trump said he called off last weekend’s trade talks with China, raising questions about the future of a trade deal that is now the most stable point in an increasingly tense relationship, Bloomberg reported.

“I canceled talks with China,” Trump said Tuesday in Yuma, Arizona. “I don’t want to talk to China right now.”

The phase-one trade deal, which came into force in February, had called for discussions on implementation of the agreement every six months. Chinese Vice Premier Liu He was supposed to hold a video conference call with US Trade Representative Robert Lighthizer and Treasury Secretary Steven Mnuchin, but it was postponed indefinitely.

Addressing whether the US would pull out of the phase-one deal, Trump said: “We’ll see what happens.”

Terminating the deal would require a written notification and take effect 60 days later, unless both parties agree on a different date.