Donald Trump ordered the killing of Iran Revolutionary Guards commander Qasem Soleimani.
Iran's foreign minister slammed the killing on Friday of Quds Force commander Qasem Soleimani as a dangerous escalation and warned the United States would bear responsibility for the consequences.
"The US' act of international terrorism, targeting and assassinating General Soleimani... is extremely dangerous and a foolish escalation," Mohammad Javad Zarif wrote on Twitter.
"The US bears responsibility for all consequences of its rogue adventurism," he added.
Meanwhile, Iran's supreme leader Ayatollah Ali Khamenei has vowed "severe revenge".
Tehran on Friday summoned an official from the Swiss embassy, which represents US interests in Iran, to condemn the killing.
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