Witnesses said tensions are now high in the city, with Shias protesting the attack which took place in city of Bahawalnagar in the eastern Punjab province and demanding retribution.
Hundreds of Iraqis took to the streets in Baghdad to protest a rise in targeted killings of prominent activists and journalists.
The killing of activist Ehab al Wazni outside his home has sparked daylong protests in Karbala that saw demonstrators block roads and bridges with burning tires.
How a generous effort by a Pakistani-American IT professional is helping meritorious orphans to excel in life.
Mohammed Allawi represents the same establishment protesters want to get rid of, and this is best encapsulated by Moqtada al Sadr's u-turn on the protest movement.
Iran hits US air base in Iraq with ballistic missiles, marking a sharp surge in the US-Iran tensions.
Security forces say none of the demonstrators were taken into custody, while pro-Iran armed groups blamed by protesters for Friday's killings swore they had no role in the violence.
Fahem al Tai, 53, had been taking part in weeks of rallies denouncing Iraq's entrenched political elite as corrupt, inept and beholden to neighbouring Iran.
At least 350 people have died since October 1, when protesters took to the streets to decry corruption.
Six people were killed in three blasts in Iraqi capital Baghdad, medics say, even as Iraqi security forces shot dead two protesters in Baghdad and central Karbala cities.
Officials say the demonstrators were killed at capital Baghdad's Rasheed Street in ongoing clashes with security forces.
Tens of thousands of people have taken to the streets in recent weeks in Baghdad and across the south demanding sweeping political change.
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