Protesters took to the streets of Tehran Saturday - burning US and Israeli flags and chanting - "No compromise, no surrender, just war with USA"
Nearly 100 protesters gathered outside the country's foreign ministry and carried banners against the killing of the country's top nuclear scientist and called for action against the perpetrators.
Protesters also burned the flags of Israel and the United States.
Mohsen Fakhrizadeh, who headed the research and innovation wing at Iran's Defense Ministry, was killed on Friday on the outskirts of the capital Tehran.
The second high-profile assassination this year since January, when Gen. Qassem Soleimani was killed by a US airstrike, the killing of Fakhrizadeh has drawn outrage and anger in Tehran.
Security analysts warn the incident could spark dangerous tensions in the region, as top Iranian military officials have vowed retaliation.
The top nuclear scientist was attacked in Damavand county near Tehran after assailants blew up a vehicle and then opened fire at his vehicle.
From Brexit breaking news to HD movie trailers, The Sun newspaper brings you the latest news videos and explainers from the UK and around the world.
Become a Sun Subscriber and hit the bell to be the first to know
Read The Sun: www.thesun.co.uk
Like The Sun on Facebook: www.facebook.com/thesun/
Follow The Sun on Twitter: twitter.com/TheSun
Subscribe to The Sun on Snapchat: www.snapchat.com/discover/The_Sun/1633225139