In this Wednesday, Jan. 8, 2020 photo, rescue workers search the scene where a Ukrainian plane crashed in Shahedshahr, southwest of the capital Tehran, Iran. Distance, political tensions and the violent nature of an airplane crash — they're all factors that complicate how families will lay to rest the victims of the deadly plane crash in Iran. THE CANADIAN PRESS/AP-Ebrahim Noroozi
The secretary of Ukraine's national security council says seven possible causes are under investigation in the plane crash in Iran earlier this week. Oleksiy Danilov tells a Swedish broadcaster that Ukrainian experts are working at the site near Tehran where the Ukrainian jetliner with 176 people on board crashed.
Sixty-three Canadians died. Prime Minister Justin Trudeau and other Western leaders say the plane appears to have been hit by a surface-to-air missile near Tehran -- an allegation that Iran denies.
The head of Iran's investigation team into the crash tells state television that Tehran will use expert help from Russia, Ukraine, France and Canada ``if we cannot recover data'' from the plane's recorders.
Canada's Transportation Safety Board says it is making arrangements for investigators to travel to Tehran