PARIS  In what seemed intended as a display of technological advance, Iran said on Wednesday that it had fired a rocket into space carrying living organisms  a rat, two turtles and worms, according to the state-run Press TV.

The test involved a rocket described as the Kavoshgar-3, which is capable of carrying satellites. Iran’s missile program has prompted worries among Western analysts that it is working on a weapons delivery system with broad regional consequences. In December, Iran said it test-fired an improved version of its most advanced missile, the Sejil-2, capable of reaching Israel and parts of Europe.

The Wednesday launching came a day after the Iranian president, Mahmoud Ahmadinejad, suggested that his country would support an agreement to export low-enriched nuclear fuel, a deal put forth by the United States and other Western countries that seeks to head off a crisis over Iran’s nuclear program.

Mr. Ahmadinejad’s comments, which were reported by Press TV, appeared to contradict Iran’s rejection of the deal a few weeks ago, extending a series of ever-shifting public statements by Iran on the proposal. Diplomatic officials greeted Mr. Ahmadinejad’s remarks with skepticism.