Despite the flaring of hostilities, the US and Iran remain at a tense diplomatic impasse. US President Donald Trump yesterday promised further strikes against Iran after the first tit-for-tat attacks in a month, as a conflict that had lately settled into an economic standoff threatened to ... Key points and original sources are listed below.

• Despite the flaring of hostilities, the US and Iran remain at a tense diplomatic impasse.S1

• US President Donald Trump yesterday promised further strikes against Iran after the first tit-for-tat attacks in a month, as a conflict that had lately settled into an economic standoff threatened to ...S2