Iran's Revolutionary Guard navy on Saturday warned that any attack on Iranian oil tankers or commercial vessels would be met with a "heavy assault" on one of the US bases in the region and enemy ships, the AP reports, even as a tenuous ceasefire appeared to be holding. Iranian state TV reported the warning a day after the US struck two Iranian oil tankers, casting doubt on the month-old ceasefire that the US has insisted is still in effect. Traffic remained blocked Saturday in the Strait of Hormuz. There are no indications at the moment that the two sides are any closer to agreeing on peace terms, per the New York Times. Developments include: