Vice President JD Vance said Sunday that the U.S. is not at war with Iran, but with Tehran’s nuclear weapons program, and declined to confirm with 100% confidence that the country’s nuclear sites had been completely destroyed.

During an interview on NBC News’ “Meet the Press,” moderator Kristen Welker asked the vice president whether the U.S. was now at war with Iran after President Donald Trump said the U.S. military had dropped bombs on three Iranian nuclear sites on Saturday.

The move marked the first time that the U.S. had directly attacked Iran and prompted concerns about whether attacks could drag the U.S. into a wider war. Hours later, Iran launched retaliatory strikes against Israel, causing damage in Tel Aviv.