DUBAI, United Arab Emirates (AP) — Iran on Wednesday dismissed an American plan to pause the war in the Middle East and launched more attacks on Israel and Gulf Arab countries, including an assault that sparked a huge fire at Kuwait International Airport.

Iran’s defiance came as Israel launched airstrikes on Tehran and as the United States deployed paratroopers and more Marines to the region.

Iran’s Foreign Minister Abbas Araghchi said in an interview on state TV that his government has not engaged in talks to end the war, “and we do not plan on any negotiations.” That followed a report from Iranian state TV’s English-language broadcaster, which quoted an anonymous official as saying Iran rejected America’s ceasefire proposal and has its own demands for an end to the fighting.

Earlier, two officials from Pakistan, which transmitted the U.S. plan to Iran, described the 15-point proposal broadly, saying it addressed sanctions relief, a rollback of Iran’s nuclear program, limits on missiles and reopening the Strait of Hormuz, through which a fifth of the world’s oil is shipped.

An Egyptian official involved in the mediation efforts said the proposal also includes restrictions on Iran’s support for armed groups. The officials spoke on condition of anonymity to discuss details not yet released.

White House press secretary Karoline Leavitt insisted the U.S. and Iran are in ongoing talks even as Iranian officials deny it. “Talks continue. They are productive, as the president said on Monday, and they continue to be,” Leavitt said at a White House briefing on Wednesday.

Leavitt warned that if talks with Iran don’t pan out President Donald Trump “will ensure they are hit harder than they have ever been hit before.”

Some of the points in the U.S. ceasefire proposal were nonstarters in negotiations before the war: Iran has insisted it won’t discuss its ballistic missile program or its support of regional militias, which it views as key to its security. And its ability to control passage through the Strait of Hormuz represents one of its biggest strategic advantages.

Iran’s attacks on regional energy infrastructure along with its restrictions on the strait have sent oil prices skyrocketing, putting pressure on the U.S. to find a way to end the chokehold and calm markets.

At least 1,000 troops from the 82nd Airborne Division will be sent to the Mideast in the coming days, three people with knowledge of the plans told The Associated Press. They spoke on condition of anonymity to discuss sensitive military plans.

The paratroopers are trained to jump into hostile or contested areas to secure key territory and airfields.

The Pentagon is also in the process of sending about 5,000 more Marines, trained in amphibious assaults, and thousands of sailors to the region.

Most Americans believe the U.S. military action against Iran has gone too far, and many are worried about affording gasoline, according to a new AP-NORC poll.

The survey indicates that while Trump’s approval rating is holding steady, the conflict could be swiftly turning into a major political liability for his Republican administration.