The U.S. military said it battled Iranian forces and sank six small boats as it moved to reopen the Strait of Hormuz on Monday. The United Arab Emirates, a key American ally, said it had come under attack from Iran for the first time since a fragile ceasefire took hold in early April.

Iran has warned it will attack “any foreign armed force” in the Strait of Hormuz, “especially, the aggressive U.S. Army” as President Donald Trump’s escort mission is set to begin. The head of Iran’s central command Major General Ali Abdollahi made the warning in a statement to Iranian state broadcaster IRIB,

The British military’s United Kingdom Maritime Trade Operations center says a bulk carrier near the Strait of Hormuz has reported being attacked by multiple small craft. Sunday’s report says all crew are safe after the attack off Sirik,

Iran has proposed a 30-day resolution aiming to end the war with Israel and the U.S. rather than just extend the ceasefire.

Stock market indices fell, and oil prices rose after the reported attack on the United Arab Emirates by Iran, which came nearly a month into a ceasefire.

The exchange occurred a day after President Donald Trump announced the Navy would help commercial vessels transit the Strait of Hormuz.

The attacks followed the passage of U.S. warships and merchant vessels through the waterway despite Iran's threats against attempts to "interfere" in the strait.

By Tala Ramadan and Jacob Bogage DUBAI/DORAL, Florida, May 4 (Reuters) - Iran ⁠said ⁠it had forced a U.S. warship ⁠to turn back from entering the Strait of Hormuz on Monday, but a U.S. ​official denied a report that it had been struck by Iranian missiles,