Tehran: Iran says the US has committed a "gross violation" of the ceasefire with new air strikes it launched on the country in the past 48 hours.

Iran's Foreign ministry said it held the US responsible for the consequences of its "aggressive and unjustified actions" in the Hormozgan region.

The region has a coast along the Strait of Hormuz - the crucial waterway Iran has blocked causing a spike in world energy prices. It is unclear what impact the strikes will have on talks aimed to end the conflict.

"Without a doubt, the Islamic Republic of Iran will not leave any evil unanswered and will not hesitate to defend the Iranian nation," the Iranian statement said.