U.S. President Donald Trump’s desire to isolate the Iranian economy seems to be working.

Within hours of Washington unveiling its first round of sanctions, German carmaker Daimler AG froze a plan to make Mercedes Benz trucks in Iran. That’s even after the European Union tried to salvage the Iran nuclear deal by pledging to protect firms from Trump’s assault.

“I wouldn’t be surprised if more companies were to follow Daimler out of Iran,” said Frank Biller, a automobile analyst based Stuttgart, Germany for Landesbank Baden-Wuerttemberg. “With the political situation right now, I’m sure a lot of companies are at least thinking about suspending their activities.”