BEIRUT (AP) — The apparent crash of a helicopter carrying Iran’s president and foreign minister on Sunday sent shock waves around the region.

Details remained scant in the hours after the incident, and it was unclear if Iranian President Ebrahim Raisi and the other officials had survived.

Here’s what we know so far.

WHO WAS ON BOARD THE HELICOPTER AND WHERE WERE THEY GOING?

The helicopter was carrying Iranian President Ebrahim Raisi, the country’s Foreign Minister Hossein Amirabdollahian, the governor of Iran’s East Azerbaijan province and other officials and bodyguards, according to the state-run IRNA news agency. Raisi was returning from a trip to Iran’s border with Azerbaijan earlier Sunday to inaugurate a dam with Azerbaijan’s President Ilham Aliyev, the news agency said.