We're only hearing about this now because "the news of this attack on Christians on Christmas Day was intentionally blocked by media and administration of capital city Islamabad."
The ICC has a more recent account here, noting again that the attackers have gone unpunished. "Muslim mob attacked Christian worshipers on Christmas Day in Islamabad," from the Pakistan Christian Post, December 29, 2012:
Pakistan: December 29, 2012. (PCP) When President of Pakistan Asif Ali Zardari and Chairman ruling Pakistan Peoples Party PPP Bilawal Bhutto Zardari were cutting Christmas cake presented by National Harmony Minister a Pakistani Catholic Dr. Paul Bhatti and photo session was being enjoyed by Archbishop of Karachi Bishop Joseph Coutts and Karachi Diocese Bishop of Church of Pakistan Sadiq Daniel in Karachi on December 25, 2012, a Muslim mob equipped with lethal weapons was firing at innocent Christian worshipers who were coming out of different Churches in Iqbal Town of capital city of Pakistan Islamabad.
It was 12:00 noon, in Iqbal Town in Islamabad, on December 25, 2012, when Christian worshipers were coming out of different Churches after performing Christmas prayers, more than one hundred Muslim extremists equipped with automatic rifles, pistols and sticks attacked the Christian women, children and men.
Ashraf Masih, when running to save his life was hit with bullet in his leg, Iqbal Masih received bullet injuries in his leg and arm, Shahzad Masih was injured fell on ground and was beaten with sticks mercilessly by mob, Yousaf Masih was seriously injured while more than one dozen Christian women, men and children received injuries.
The area police of Shahzad Town Police Station arrived on scene to maintain law and order and arrested only two Muslims named Mohammad Khalid and Mohammad Riasat Satti and sent injured Christians for medico-legal in hospital.
The case under Section 452, 109, 324,148,149 PPC was registered in First Information Report FIR number 669/2012, in Shahzad Town PS against 35 unknown and 4 nominated Muslim attackers but police released one nominated arrested accused Mohammad Riasat Satti same evening of December 25, 2012.
The tension was high all over Pakistan and special security arrangements were adopted by government after a religious decree of one Muslim cleric against celebrations of Christmas and participation of Muslims in it.
A religious decree (Islamic Fatwa) issued on Facebook by one Muslim cleric Ibtisam Elahi Zaheer as “We should be tolerant towards people of other religions but we cannot participate in religious ceremonies and events of non-Muslims. Christmas is religious event of Christians and according to their theology Jesus was son of Allah born to Allah on this particular day so we need to avoid this event and should not greet them. Muslims can eat their food and are allowed to marry chaste women of Christians but Christmas cannot be celebrated by Muslims because it is against the concept of monotheism in Islam”
The National Harmony Minister Dr. Paul Bhatti and State Minister Akram Gill were also busy in photo shoots with high ranking officials and Shahzad Town Police Station officials were not arresting Muslim attackers but twisting incident in communal riots.
Mr. Basharat Khokhar, a human right activist, based in Islamabad was first to reach Iqbal Town today to negotiate with administration to remove blockades from areas of Christian residents who were under siege from Christmas day and running out of food supplies and milk for children on fear of safety and security of life from further attacks of Muslim mob.
Pakistan Christian Post contacted DSP Arshad Ali Khokhar and SHO Fiaz Ahmad Ranjha of Shahzad Police Station for information on not arresting Muslim accused in FIR but none was available to respond.
The news of this attack on Christians on Christmas Day was intentionally blocked by media and administration of capital city Islamabad.