Beijing on Monday rejected as "groundless" reports that Chinese entities supplied Tehran with satellite images of a military base housing US troops in Jordan before and after an Iranian strike killed three American soldiers.

The reports concerned July 17 missile strikes launched by Iran on the Muwaffaq Salti Air Base in Jordan. Unnamed American officials cited in the reporting did not name the Chinese entities involved and did not suggest that Beijing was directly to blame.

Chinese foreign ministry spokesperson Guo Jiakun told a regular news conference that China firmly opposes "groundless suspicion and accusations without evidence."

US President Donald Trump sought to downplay the reports, which could deepen tensions ahead of a planned visit by Chinese leader Xi Jinping to the White House on September 24.