Fourteen people are dead and more than 70 injured after two Taliban suicide bombers targeted churches in Pakistan's Lahore.
The attacks, on Sunday, sparked mob violence in which two other suspected militants died.
Up to 4000 Christians later took to the streets of the eastern city, many armed with clubs, smashing vehicles and overrunning a bus station.
The bombings occurred during prayers at two churches about half a kilometre apart in the city's Youhanabad neighbourhood that is home to more than 100,000 Christians, officials said.
"We have received 14 dead bodies and 70 injured," said General Hospital superintendent Dr Mohammad Saeed Sohbin.
The figure did not include the suspected militants who were lynched or the bombers, he added.
Lahore's top health official, Zahid Pervez, confirmed the toll and told reporters 78 people were wounded in both attacks.
Broken window panes, blood and shoes were scattered across the blast sites.
Police spokeswoman Nabila Ghazanfar said two policemen guarding the churches were among those killed, while two people were later beaten to death by protesters.
"Policemen on duty at both the entrances tried to stop them but the bombers blew themselves up," she told news agency AFP.
"The angry mob protesting after the blast beat to death two people whom they suspected of being associates of the attackers."
The Pakistani Taliban's Jamaat-ul-Ahrar faction described the blasts as suicide attacks and vowed to continue their campaign for the enforcement of Sharia Islamic law.
Christians make up about two per cent of Pakistan's mainly Muslim population of 180 million. They have been targeted in attacks and riots in recent years, often over allegations of profanity regarding the Koran or the Prophet Mohammed.
Sunday's attacks were the worst since a devastating double suicide-bombing in the northwestern city of Peshawar in September 2013 killed 82 people.
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