TEHRAN, Iran – Iran’s supreme leader told a nuclear disarmament conference in Tehran on Saturday that the United States’ atomic weapons are a tool of terror and intimidation.

Ayatollah Ali Khamenei said America deceptively calls for nonproliferation while holding on to its own weapons and failing to confront Israel, which is widely believed to have nuclear bombs.

The two-day conference appeared timed as a counterweight to President Obama’s 47-nation summit in Washington last week to discuss nuclear security.

Obama did not invite Iran, which the U.S. fears is using a civilian nuclear program as cover to develop a weapons capability. Iran denies that and says its nuclear work is only for peaceful purposes such as power generation.

Iran’s conference brought together representatives from 60 countries, including China, Russia, Pakistan, Iraq and France, according to Iranian media.