Minutes of the Federal Reserve’s last meeting released Wednesday signaled broad support for another interest-rate hike in September with the economy growing strongly, but also deep concern that a major escalation in ongoing trade disputes could derail the economy.

Many Fed officials said that if data continue to support their outlook, “it would likely soon be appropriate to take another step in removing policy accommodation,” the minutes said. Fed watchers take that language as support for a move at the next policy meeting, set for late September.

Current market odds are signaling a 96% probability of a rate hike in September and 60% chance of another in December.

At the same time, officials said they might have to pause from their gradual rate path if there is an escalation in international trade disputes. Fed officials were unanimous in their view that a trade war represented a major downside risk to the economy.

“Most expressed the view that an escalation in international trade disputes was a potentially consequential downside risk for real activity,” the minutes said.

The Trump administration as early as Thursday may level new tariffs on $16 billion worth of Chinese goods as it considers whether to impose levies on another $200 billion worth.

Trade-war tracker:Here are the new levies, imposed and threatened

Given the complex nature of trade issues “a major trade escalation” presented a challenge in determining the appropriate way to respond, some officials said.

“There’s little doubt rates are going up on September 26, though the outlook gets a little dicier beyond then given trade policy risks,” said Sal Guatieri, senior economist at BMO Capital Markets.

At the meeting, Fed officials also agreed they would “fairly soon” need to scrap the language describing their policy stance as “accommodative” because the level of rates is getting closer to neutral.

There was sharp disagreement about the shape of the yield curve, the closely watched difference between short-and long-term bond yields. This curve continued to flatten. Some regional Fed president have signaled they are worried about policy that could result in an inverted yield curve, which has been a fairly reliable predictor of recessions.

But other Fed officials pushed back, saying that low interest rates around the world may make the yield curve less significant.

Scott Anderson, chief economist at the Bank of the West, agreed in an interview the minutes show a “green light” for a rate hike in September and said he expected a “pretty big showdown whether they go another time this year or not, given that the Fed is dividing into two camps about whether the yield curve is a real signal.

In the end, Anderson said he was still forecasting another rate hike in December.

Seth Carpenter, chief U.S. economist at UBS, said he thinks disruptions to the economy from the trade fight with China will heat up in the fall, forcing the Fed to pause in December.

The minutes also showed the Fed had a lengthy discussion about what to do if they are forced to push interest rates back down to zero in the next recession,

Officials said there was a “meaningful risk” rates could go back to zero during the next decade.

In the wake of the Great Recession, the Fed started buying Treasurys and mortgage-related assets to get long-term rates down. This policy was controversial and the Fed acknowledged that academics still don’t agree on whether it was effective.

Officials said their toolkit of “forward guidance” and asset purchases was “effective,” but decided to keep talking about alternatives.

Economists said Fed Chairman Jerome Powell may elaborate on this issue in his speech Friday in Jackson Hole.

There was little reaction to the minutes in financial markets. Financial conditions have eased over the past month as investors think the Fed may not have to push interest rates into restrictive territory.