The British ambassador to Iran, Robert Macaire, is arrested during anti-government protests, after attending a vigil and then, according to BBC, getting his hair cut. According to Tasnim News Agency he was arrested "on suspicion of organising, provoking and directing radical actions". U.K. Foreign Secretary Dominic Raab states the arrest is in "flagrant violation" of international law. More than an hour later, Macaire is released from custody.
Vigils in Iran that were held for the victims subsequently turn into protests. According to Twitter videos, hundreds of protesters in Tehran call for the resignation of Supreme Leader Ayatollah Ali Khamenei.
After Canadian Prime Minister Justin Trudeau suggests the plane was downed by an Iranian missile, Iranian authorities reject this theory. Iranian civil aviation chief says he is "certain" the plane was not hit by a missile, still asserting the cause was "mechanical failure".
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".
In a news conference, Canadian Prime Minister Justin Trudeau says it's "too early to draw definitive conclusions" that the downing of the plane was an "act of war". Trudeau also condemns Iran's attack on U.S. bases in Iraq.
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.