Ships report attacks after Iran closes Strait of Hormuz, as Trump says US 'won't be blackmailed'

•Iran's security council says it is "determined" to control the Strait of Hormuz until the end of the war, and calls the continuing US blockade on Iranian ports a "breach of the ceasefire"•The key shipping channel was reopened by Iran on Friday but has now been closed again - here's how the situation has evolved•Donald Trump says "very good conversations" are under way with Iran but the US won't be "blackmailed" over the strait•A tanker and a container ship have both reported attacks off the coast of Oman, the UK Maritime Trade Operations says