rewrite this isn 3 sentances - GALLE, Sri Lanka/WASHINGTON, March 4 (Reuters) - A U.S. submarine has sunk an Iranian warship off the southern coast of Sri Lanka, resulting in the deaths of dozens of sailors and significantly escalating Washington's campai

A U.S. submarine sank the Iranian frigate IRIS Dena off the southern coast of Sri Lanka, leading to the deaths of dozens of sailors and marking a significant escalation in U.S. actions against the Iranian navy. The attack occurred in international waters, prompting U.S. Defense Secretary Pete Hegseth to describe it as "a quiet demise," and eyewitnesses reported seeing bodies floating in the water. Rescuers have recovered 87 bodies and rescued 32 survivors, with around 60 crew members still unaccounted for from the vessel, which had recently participated in Indian naval exercises.