Investing.com -- Shares of major U.S. cruise operators traded higher on Thursday after President Donald Trump called off planned military strikes against Iran.

Carnival Corp rose 6.1%, Norwegian Cruise Line gained 5.9%, and Royal Caribbean added 5.3%.

Trump on Thursday reversed course on attacks he had promised against Iran, canceling strikes and bombings that were scheduled for the evening. The president said that "discussions and final points" on a peace deal with Iran had been "approved by all parties involved."

Trump had earlier stated the U.S. would hit Iran "very hard tonight" and would look to take control of Kharg Island, one of Tehran's key oil and gas infrastructure hubs. He also said other oil infrastructure points would be targeted, and the U.S. would "assume total control of their Oil and Gas Markets."

"Based on the fact that discussions with the Islamic Republic of Iran have been brought to the highest level of Iranian leadership and approved, I have, as President of the United States of America, cancelled the scheduled strikes and bombings against Iran this evening," Trump said.

"Discussions and final points have been, in both concept and great detail, approved by all parties involved, including the United States, Israel, Saudi Arabia, UAE, Qatar, Turkey, Pakistan, Bahrain, Kuwait, Jordan, Egypt, and others. The Naval Blockade will remain in full force and effect until this Transaction is finalized — Time and place of the signing to be announced shortly," the president added.