TEHRAN — Two of the detained young men killed themselves, and another was a terrorist who died in a clash with security forces, Iran’s government officials have declared with finality. But in an extraordinary display of audacity, many Iranians, including a number of lawmakers and a top entertainment star, have assailed such conclusions.

The three young men were among more than two dozen Iranians who died in the wave of antigovernment protests that swept the country a few weeks ago, the most serious unrest to confront the Islamic republic’s political-religious hierarchy in nearly a decade.

The men’s personal stories that have since emerged have struck a nerve among many Iranians, who see glaring contradictions in the official accounts of the facts.

Their push for further investigation, including a parliamentary demand for an inquiry into the prison deaths, suggests that while the protests have largely subsided, the fallout in Iran may be just beginning.