The Iraqi security media cell said security forces are investigating the incident that happened on Monday evening.
The explosion was caused by two hand grenades that detonated in a garbage dump near the bridge, sources said.
The Iraqi news website Al-Ma’aloumah says the explosion struck the path used by Shia pilgrims to visit the holy shrine of their seventh imam, Musa al-Kadhim (PBUH), whose martyrdom anniversary falls on March 9 this year, in al-Kadhimiya region.
Iraq’s intelligence agency said it had arrested three members of a terror cell earlier in the day who were planning a suicide attack on pilgrims of Imam al-Kadhim.
Baghdad’s Operation Command said the pilgrims will continue their annual march to the mosque.
A few hours after the incident, Iraqi Prime Minister Mustafa al-Kadhimi also visited the scene of the explosion.
The Monday explosion came the same day Pope Francis left Baghdad after a historic three-day visit to Iraq.
