According to US media, Iran has begun putting mines within the Strait of Hormuz. Trump is threatening the nation with retribution for this. According to him, a number of suspected minelaying boats have already been destroyed.
https://www.spiegel.de/ausland/irankrieg-trump-warnt-iran-vor-verminung-der-strasse-von-hormus-a-b1fd3d95-7baa-4796-bf53-3be9c04dfd9e#ref=rss