The terrorist attack took place in Quetta, Balochistan, on Thursday.
Three security forces and two civilians sustained injuries when a remote-controlled bomb went off in one of the city’s streets as the convoy passed.
The pilgrims, who are from Sukkur in Sindh province, were on their way to visit the holy shrine of Imam Reza (AS) in the northeastern Iranian city of Mashhad.
Three Shia Muslims were martyred in May 2015 in a similar attack on the pilgrims of Imam Reza (AS) in Quetta.
That attack was claimed by Sipah-e-Sahaba terrorist group.