Iranian missiles struck two communities in southern Israel late Saturday, leaving buildings shattered and dozens injured in dual attacks not far from Israel's main nuclear research centre, while President Donald Trump warned the US will "obliterate" Iranian power plants if it doesn't fully open the Strait of Hormuz within 48 hours. The developments signalled the war was moving in a dangerous new direction at the start of its fourth week. Trump -- who is facing increasing pressure at home to secure the strait as oil prices soar -- issued the ultimatum in a social media post while he spent the weekend at his Florida home. Trump said he's giving Iran 48 hours to open the vital waterway or face a new round of attacks. He said the US would destroy "various POWER PLANTS, STARTING WITH THE BIGGEST ONE FIRST!" The Strait of Hormuz, which connects the Persian Gulf to the rest of the globe's oceans, is a critical pathway for the world's flow of oil. Attacks on commercial ships and threats of