Which Caliph was assassinated while leading the Fajr prayer, an event that significantly impacted the succession to the caliphate?

Explanation

– Umar (RA) was assassinated while leading the Fajr prayer by a Persian slave named Abu Lulu Firoz, an event that prompted the establishment of a consultative council (Shura) to determine his successor rather than a direct nomination.
– This council ultimately selected Uthman (RA) as the third Caliph.
– For exams, note that Ali (RA) was also later assassinated, struck while leading Fajr prayer in the mosque of Kufa by a member of the Kharijite faction.