Pakistan, Jan. 3 -- Top Iranian commander Qasem Soleimani was killed on Friday in a US strike on Baghdad's international airport, confirmed Iran and the US, in a dramatic escalation of tensions between the two countries.

The Pentagon said US President Donald Trump ordered Soleimani's "killing", after a pro-Iran mob this week laid siege to the US embassy. Following Soleimani's death, Trump tweeted an image of the US flag without any further explanation.

In the wake of the assassination, the US embassy in Baghdad urged all citizens to depart Iraq immediately.

"US citizens should depart via airline while possible, and failing that, to other countries via land," it said in a statement.

Meanwhile, Iranian Supreme Leader Ayatollah Ali Khame...