The disaster has turned into a domestic political crisis that has for now overshadowed Iran’s struggle with the United States. In one sign of public anger, a moderate Iranian newspaper declared in a banner headline on Sunday: “Apologize and resign.”

Iran admitted responsibility for downing the plane, after denying it for days, and the country’s president, Hassan Rouhani, called the error an “unforgivable mistake.” But Ukrainian officials said the admission came only because its own investigators had found evidence of a missile strike at the crash site.

Related: President Trump’s defense secretary, Mark Esper, said on Sunday that he never saw specific evidence of the president’s claim that the U.S. killed a top Iranian general in part because Tehran was planning attacks on four American embassies.

Go deeper: Our reporters pieced together the story of how American officials secretly planned the attack on the general — and why the two countries came close to open war.

Video: Here’s what we know about the doomed jet’s seven-minute flight.

Looking back: The downing of the Ukrainian jet has an eerie echo of a crash in 1988, when the U.S. Navy accidentally shot down a Dubai-bound Iranian passenger jet in the waning days of the Iran-Iraq war.