Supporters of Pakistan People's Party chant slogans during protest to condemn Tuesday's killings of three polio vaccination workers, in Karachi
Women supporters of political party Pakistan People's Party (PPP) chant slogans during a protest to condemn Tuesday's killings of three polio vaccination workers, in Karachi January 22, 2014. Police arrested more than 100 suspects after three polio eradication workers, including two women, were shot dead by armed men on motorcycles during a vaccination drive on Tuesday in Qayyumabad, eastern Karachi, local media reported. REUTERS/Akhtar Soomro (PAKISTAN - Tags: CIVIL UNREST POLITICS CRIME LAW HEALTH)
Shi'ite Muslims sit beside the covered bodies of victims who were killed in Tuesday night's bomb attack on a bus, during a protest in Quetta
Shi'ite Muslims sit beside the covered bodies of victims who were killed in Tuesday night's bomb attack on a bus, during a protest in the provincial capital of Quetta January 22, 2014. On Tuesday, a bomb targeting a bus killed 24 Shi'ite pilgrims, many of them women and children. Such sectarian attacks are increasingly common in Pakistan, where Shi'ites make up 20 percent of the 180 million people. On Wednesday, hundreds of Shi'ites protested against the bus bombing by sitting in the road alongside the bodies of the dead in Quetta. The sheets draped over the coffins read, "I follow your command (Imam) Hussein (Prophet Mohammad's grandson)". REUTERS/Naseer Ahmed (PAKISTAN - Tags: POLITICS CIVIL UNREST CRIME LAW TPX IMAGES OF THE DAY)
Shi'ite Muslims sit beside the covered body of a victim who was killed in Tuesday night's bomb attack on a bus, during a protest in Quetta
Shi'ite Muslims sit beside the covered body of a victim who was killed in Tuesday night's bomb attack on a bus, during a protest in the provincial capital of Quetta January 22, 2014. On Tuesday, a bomb targeting a bus killed 24 Shi'ite pilgrims, many of them women and children. Such sectarian attacks are increasingly common in Pakistan, where Shi'ites make up 20 percent of the 180 million people. On Wednesday, hundreds of Shi'ites protested against the bus bombing by sitting in the road alongside the bodies of the dead in Quetta. REUTERS/Naseer Ahmed (PAKISTAN - Tags: POLITICS CIVIL UNREST CRIME LAW)
Shi'ite Muslims shout slogans beside the covered bodies of those who were killed in Tuesday night's bomb attack on a bus, during a protest in Quetta
Shi'ite Muslims shout slogans as they sit beside the covered bodies of those who were killed in Tuesday night's bomb attack on a bus, during a protest in the provincial capital of Quetta January 22, 2014. On Tuesday, a bomb targeting a bus killed 24 Shi'ite pilgrims, many of them women and children. Such sectarian attacks are increasingly common in Pakistan, where Shi'ites make up 20 percent of the 180 million people. On Wednesday, hundreds of Shi'ites protested against the bus bombing by sitting in the road alongside the bodies of the dead in Quetta. REUTERS/Naseer Ahmed (PAKISTAN - Tags: POLITICS CIVIL UNREST CRIME LAW)
A woman chants slogans as she walks ahead of police vehicles, during road block protest against search operation, after killings of three polio vaccination workers on Tuesday, in Karachi
A woman chants slogans as she walks ahead of police vehicles, during a road block protest against a search operation, after the killings of three polio vaccination workers on Tuesday, in Karachi January 22, 2014. Police arrested more than 100 suspects after three polio eradication workers, including two women, were shot dead by armed men on motorcycles during a vaccination drive on Tuesday in Qayyumabad, eastern Karachi, local media reported. REUTERS/Akhtar Soomro (PAKISTAN - Tags: CIVIL UNREST POLITICS CRIME LAW HEALTH)
Policemen walk along road to disperse residents, during road block protest against a search operation, after killings of three polio vaccination workers on Tuesday, in Karachi
Policemen walk along a road to disperse residents, during a road block protest against a search operation, after the killings of three polio vaccination workers on Tuesday, in Karachi January 22, 2014. Police arrested more than 100 suspects after three polio eradication workers, including two women, were shot dead by armed men on motorcycles during a vaccination drive on Tuesday in Qayyumabad, eastern Karachi, local media reported. REUTERS/Akhtar Soomro (PAKISTAN - Tags: CIVIL UNREST POLITICS CRIME LAW HEALTH)
Police officials and relatives offer prayers for policemen, who were killed in a bomb attack, during a funeral ceremony in Charsadda
Police officials and relatives offer prayers for policemen, who were killed in a bomb attack, during a funeral ceremony at the Police Line, or the police's main office, in Charsadda, on the outskirts of Peshawar January 22, 2014. At least seven people were killed and nine others were injured in an explosion near a police mobile van in Sardheri Bazaar in Charsadda district in Khyber Pakhtunkhwa, local media reported. REUTERS/Fayaz Aziz (PAKISTAN - Tags: POLITICS CIVIL UNREST CRIME LAW RELIGION)
Residents display empty tear gas shells fired by police, to members of media, during road block protest against search operation, after killings of three polio vaccination workers on Tuesday, in Karachi
Residents display empty tear gas shells fired by the police, to members of the media, during a road block protest against a search operation, after the killings of three polio vaccination workers on Tuesday, in Karachi January 22, 2014. Police arrested more than 100 suspects after three polio eradication workers, including two women, were shot dead by armed men on motorcycles during a vaccination drive on Tuesday in Qayyumabad, eastern Karachi, local media reported. REUTERS/Akhtar Soomro (PAKISTAN - Tags: CIVIL UNREST POLITICS CRIME LAW HEALTH)
Police officials and relatives offer prayers for policemen, who were killed in a bomb attack, during a funeral ceremony in Charsadda
Police officials and relatives offer prayers for policemen, who were killed in a bomb attack, during a funeral ceremony at the Police Line, or the police's main office, in Charsadda, on the outskirts of Peshawar January 22, 2014. At least seven people were killed and nine others were injured in an explosion near a police mobile van in Sardheri Bazaar in Charsadda district in Khyber Pakhtunkhwa, local media reported. REUTERS/Fayaz Aziz (PAKISTAN - Tags: POLITICS CIVIL UNREST CRIME LAW RELIGION)
Policemen march around the caskets of their colleagues, who were killed in a bomb attack, during a funeral ceremony in Charsadda
Policemen march around the caskets of their colleagues, who were killed in a bomb attack, during a funeral ceremony at the Police Line, or the police's main office, in Charsadda, on the outskirts of Peshawar January 22, 2014. At least seven people were killed and nine others were injured in an explosion near a police mobile van in Sardheri Bazaar in Charsadda district in Khyber Pakhtunkhwa, local media reported. REUTERS/Fayaz Aziz (PAKISTAN - Tags: POLITICS CIVIL UNREST CRIME LAW)