Iran war live: Explosions in Tehran after Trump says US will be 'hitting Iran hard'

Explosions have been heard in Iran's capital in the early hours of Thursday after the US President Donald Trump threatened to hit the country hard.

"Another massive explosion in Tehran," journalist Vahid Mirzaei wrote in a post on X.

The explosions come just minutes after US Defence Secretary Pete Hegseth said the Central Command "will be busy tonight" following US President Donald Trump's threat of conflict.

CENTCOM forces began launching what it called "additional self-defense strikes" against multiple targets in Iran at the direction of Trump.

"The strikes are in response to Iran's unwarranted and continued aggression," the CENTCOM post on X continued.

Trump, just hours earlier at an Oval Office event, said, "We're going to ⁠be attacking them, ⁠attacking them very hard."

Explosions were also heard in Fars city and air defence systems were being activated outside the city.