TV reports say embassies, communities heighten security as Iran promises to avenge assassination of nuclear physicist Mohsen Fakhrizadeh, allegedly by Israel

Following assassination of physicist, officials in Tehran assert 'dear unassuming scientist' was involved in various important projects on virus and military defense

Students affiliated with Basij paramilitary group hold small protest outside foreign ministry in Tehran; some call to expel IAEA inspectors in response to assassination

Brussels urges 'maximum restraint' after Tehran points finger at Israel in deadly Friday ambush; Iranian leaders promise revenge

Khamenei calls for 'punishing the perpetrators,' says Fakhrizadeh's scientific work will continue

A team of gunmen assassinated alleged head of Iranian nuclear weapons program, several of his bodyguards, after stopping vehicle with a hidden explosive, local reports say

UN calls for restraint after assassination of Iranian nuclear scientist; Pompeo announces sanctions against supporters of Iran's missile program; US aircraft carrier sails to Gulf

US reportedly determined in 2007 that the scientist's job as a lecturer was a cover for his role spearheading Tehran's illicit nuclear weapons development

Three intelligence officials tell paper that Jerusalem is responsible for assassination of Mohsen Fakhrizadeh, as Iran vows 'severe revenge' for killing

Zarif blasts 'terrorist cowardice' in Mohsen Fakhrizadeh's killing; army chief, senior adviser to Khamenei promise retaliation: 'We will make them regret their actions!'

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