The country has not commented publicly about Ahmed Shihab-Eldin, who the Committee to Protect Journalists said had been charged with spreading false information.
The gathering ended with encouraging words, even as Israel continued to refuse to halt its military campaign against Iran-backed Hezbollah in Lebanon.
Prime Minister Keir Starmer said the U.K.’s diplomatic efforts are directed at keeping the vital waterway “open, not shut.”
Prime Minister Keir Starmer of Britain is strengthening ties in Europe and the Middle East as the once-special relationship with America sours.
Vice President JD Vance said 21 hours of peace talks between the United States and Iran had failed to produce a deal to end the war.
Kristalina Georgieva, the head of the International Monetary Fund, said the war in the Middle East could lead to another bout of inflation and higher interest rates.
After careening from one diplomatic extreme to another, President Trump finds himself with a fragile deal that is already showing signs of fraying.
The United States and Israel attacked Iran on Feb. 28, starting a weekslong war that spread to neighboring countries and rocked global markets.
President Trump taunted Iran on social media, while strikes continued in Iran, Israel, Lebanon and some Gulf states.
The president said he would bomb Iran “back to the Stone Ages.” Until this administration, American leaders had insisted they were trying to follow international law in war.