Last Friday, Mohammed Hassan Ali bin Isa and Abdul-Jalil al-Arbash were killed while trying to prevent a suicide bomber from entering a packed mosque in Saudi Arabia.
The suicide bomber was disguised as a woman, and when he attempted to enter the Dammam mosque, both men realized the deception and quickly ushered him away from the entrance, according to the Associated Press.
In the end, four people were dead: the suicide bomber, the two heroes and an unnamed man.
The attack was later connected to ISIS.
Footage from inside the mosque was posted to Twitter, showing how many people could have been killed:
— mohammad boland (@mohadboland) May 29, 2015