State-run media says Tehran's retaliation won't be limited to the source of the threat, without elaborating; Rouhani, Zarif may skip UN meeting since US hasn't issued visas

Strike was to convince US-allied kingdom to end its war on Houthi rebels, says Iranian president, in implicit denial of Washington's allegation his country launched assault

US president facing competing urges of keeping up pressure on Tehran to negotiate while deterring any further Iranian attacks and avoiding another Middle East war

Attack blamed on Iran that halved kingdom's oil production is latest in a series of unclaimed acts of sabotage in the Gulf, which experts say could be a new tactic by Tehran

Wall Street Journal says Washington provided Riyadh with assessment of airborne weapons used in assault but Saudis say not enough evidence it was launched by Iranians

US president has the world on tenterhooks over his response to a weekend attack on Saudi oil facilities that his top diplomat has blamed on the Iranians

As hawkish Republicans urge the president to weigh an attack over oil facility assault, Democrats invoke need for Congressional authorization

After saying earlier that US was 'locked and loaded,' president seems intent on consulting allies before taking action

After briefing Trump, Mark Esper says America and its allies will 'defend the international rules-based order that is being undermined by Iran'

Benchmark crude prices go up by $10, a percentage climb unseen since 1991 Gulf War, amid the worst disruption to world supplies on record