Washington/Tehran, June 17 -- Mixed messaging over the status of the US naval blockade around Iran and uncertainty surrounding the terms of the emerging US-Iran agreement continue straining shipping activity through the Strait of Hormuz.

The conflicting signals have made several major shipping companies reluctant to resume normal operations in what is one of the world's most important energy corridors, despite signs of strong diplomatic progress between Washington and Tehran.

On Sunday, President Donald Trump announced that an agreement had been reached with Iran and said he would "authorise the immediate removal of the United States Naval blockade."However, subsequent statements from US officials appeared to present a different timeline....