A suicide bomber blew himself up on Sunday as he targeted a Shia procession in Baghdad, killing two, authorities said.
Four others were injured in the attack in the mostly Shia district of Karada in the Iraqi Baghdad, the city's Operations Command, a security body, added.
The targeted procession was part of wider Shia religious events marking Ashura, a commemoration of the death of Hussein, the grandson of the prophet Mohammed.
No one has claimed responsibility for the attack.
The bombing comes a day after 40 people were killed in a suicide attack targeting a funeral in the mostly Shia neighbourhood of Shaab in northern Baghdad, police said.
The radical Sunni Daesh group claimed Saturday's attack.
Daesh members regard Shias as heretics.
The latest attacks come as Iraq is gearing up for a US-backed military campaign to retake Mosul, the country's second-biggest city, from Islamic State.
Mosul in northern Iraq has been under Daesh's control since mid-2014.
By Kadhem al-Attabi
