The plane, which was carrying at least 170 people, went down near Tehran because of technical problems, killing everyone on board, the local news media said.
The plane was bound for Kyiv, Ukraine’s capital, local media reported. Ukraine International Airlines Flight 752 departed Imam Khomeini International Airport in Tehran at 6:12 a.m. on Wednesday and lost contact at 6:14 a.m.
The crash came at a tense time in Iran, as political escalations with the USA had the country on edge. The F.A.A. banned American airliners from flying over Iran, citing the risk of commercial planes being mistaken for military aircraft.