United States Senator Bernie Sanders learns of Iranian strikes live while speaking at rally

United States Senator Bernie Sanders was speaking live at a rally when news broke of American air strikes in Iran.

Footage shows Sanders speaking at the rally in Tulsa, Oklahoma, as part of his “Fight the Oligarchy” tour across the US when news broke of the American attacks at three Iranian nuclear sites.

WATCH THE VIDEO ABOVE: Footage shows Bernie Sanders learning of American strikes live on stage.

Sanders read Trumps statement live to the audience on Saturday night local time, who began booing and chanting “no more war”.

“It is so grossly unconstitutional,” he said.

“The only entity that can take this country to war is the US Congress. The president does not have the right.”

Trump had moments before announced on his social media platform Truth Social that the US had executed three “very successful attacks” on the sites at Fordow, Natanz and Esfahan.

Sanders has been an outspoken critic of Trump and his political agenda, with the Independent senator of Vermont earlier this month calling the US president a danger to American democracy.

“The American people do not want more war, more death,” Sanders said at the rally.

“It might be a good idea if we concentrate on the problems that exist (in America) than getting involved in another war we do not want.”

Trump had only days ago given himself a two-week deadline to decide if US forces will strike Iran.

The White House had insisted the delay was to give Iran leadership a chance to negotiate and shut down its nuclear program.