US-Iran talks edge toward a possible Middle East ceasefire, but disputes over nuclear enrichment, Hormuz, sanctions relief and missiles threaten another crisis.

A fragile ceasefire has been in place since April 8, punctuated by skirmishes as the U.S. and Iran jockey over the Strait of Hormuz.

The key sticking points in the peace negotiations between the US and Iran have been Tehran's nuclear programme and control over the Strait of Hormuz. | World News

By JAN YUMUL in Hong Kong and CUI HAIPEI in Dubai, UAE |