Boeing faced new questions over the impact of tariffs on exports to China on Thursday as the spotlight fell on the fate of jets waiting at an aircraft completion plant near Shanghai.

Shares of Boeing fell Tuesday following a report that China has halted the delivery of all its jets to airlines in the country as part of the escalating trade war.

Boeing Co. has found itself at the center of the raging trade war between the U.S. and China, with the latter reportedly instructing its airlines to halt deliveries of the U.S.-made jets.