Iran's top nuclear official was denied entry to a Vienna meeting, according to state television. The official, who is responsible for the country's nuclear program, was blocked from attending the talks due to pressure from the United States. The meeting, which was expected to address ongoing nuclear negotiations, was postponed as a result. The Iranian state media reported that the decision was made without prior notice, causing confusion among the Iranian delegation. The U.S. Has been a key player in the negotiations, and its influence appears to have played a major role in the cancellation. The situation highlights the ongoing tensions between Iran and Western powers over nuclear issues. The Iranian government has expressed disappointment over the decision, calling it an obstacle to progress in the talks. The outcome remains uncertain as both sides continue to negotiate.