U.S., Canadian, British and Iraqi officials say they believe the plane crash near Tehran in which 176 were killed yesterday was likely caused accidentally by an Iranian anti-aircraft missile, while Iran says it was due to "mechanical failure".
A Boeing 737-800 crashes while taking off from Tehran Imam Khomeini International Airport, killing all 176 people on board. The incident, which took place amid the 2019–20 Persian Gulf crisis, is under investigation.
Iran's Islamic Revolutionary Guard Corps issues a statement warning regional countries not to allow the United States military to launch attacks on Iran from their territory or they "will be targeted".
In response to Iranian missile attacks on U.S. forces, the U.S. Federal Aviation Administration (FAA) bans all U.S. commercial flights from operating in airspace over Iraq, Iran, the Persian Gulf and the Gulf of Oman.
U.S. President Donald Trump threatens Iraq—if the U.S. would be required to leave the country—with a bill for a "very extraordinarily expensive" air base and also with sanctions that would "make Iranian sanctions look somewhat tame".