Sixty-six people have been killed in a passenger plane crash in Iran, airline company officials say.
The Aseman Airlines plane, en route from Tehran to the south-western city of Yasuj, came down in the Zagros mountains of central Iran.
The Red Crescent has deployed a search and rescue team to the site near the city of Semirom in Isfahan province.
The plane left Tehran in at 05:00 local time (01:30 GMT) and disappeared from radar later.
A local official said bad weather had hampered a helicopter search.
“All emergency forces are on alert,” a spokesman said.
The plane is believed to be a 20-year-old ATR 72-500.
Reports say those on board were 60 passengers, two security guards, two flight attendants and the pilot and co-pilot.