Iran's state-run IRNA news agency says at least 11 people were on board the small Turkish private plane that crashed.
The plane was traveling from Sharjah in the United Arab Emirates to Istanbul before going down near the Shahr-e Kord region in the southwestern province of Chaharmahal and Bakhtiari.
Mojtaba Khaledi, the spokesman of the National Disaster Management Organization of Iran, said the plane hit a mountain near Shahrekord and burst into flames.
The plane took off around 4:41 p.m. (1311 GMT; 9:11 a.m. EST) Sunday and reached a cruising altitude of just over 35,000 feet, according to FlightRadar24, a flight-tracking website. A private company that handles public relations for the Sharjah airfield, the home of low-priced airline Air Arabia, declined to immediately comment.
Reza Jafarzadeh, who is head of the organisation, said the plane was carrying eight passengers and three crew members. Sharjah is a neighboring emirate of Dubai. Turkey's NTV channel, quoting the Turkish transport ministry, said the plane belonged to the Istanbul-based Basaran Holding Company which is active in the energy, construction and tourism sectors.
His daughter and seven of her friends were on board the plane and were returning from a hen party in Dubai when it crashed, Turkish media reported.
It is said that between 10 to 20 people have been on board.