A supporter of Pakistan's MQM political party listens to a speech during a rally to show solidarity with the Pakistan Army in their ongoing offensive against militants in North Waziristan, in Karachi
A supporter of Pakistan's Muttahida Quami Movement (MQM) political party wears a poster of his leader Altaf Hussain on his head as he listens to a speech, during a rally to show solidarity with the Pakistan Army in their ongoing offensive against militants in North Waziristan, in Karachi July 6, 2014. REUTERS/Akhtar Soomro (PAKISTAN - Tags: POLITICS CIVIL UNREST)
Displaced Pakistani girls carry drinking water on their heads at a refugee camp in Khost province
Displaced Pakistani girls carry drinking water on their heads at a refugee camp in Khost province July 2, 2014. Thousands of refugees fleeing an offensive by Pakistan's army have poured across the lawless border into ramshackle camps on rugged hills in Afghanistan. The mass departures over the porous border, which many in any case do not recognise, mark a change. For the first time in more than 30 years beleaguered residents are escaping into Afghanistan and not out of it, an irony not lost on local officials or refugee agencies. Picture taken on July 2, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
A displaced Pakistani child stands at a refugee camp in Khost province
A displaced Pakistani child stands at a refugee camp in Khost province July 2, 2014. Thousands of refugees fleeing an offensive by Pakistan's army have poured across the lawless border into ramshackle camps on rugged hills in Afghanistan. The mass departures over the porous border, which many in any case do not recognise, mark a change. For the first time in more than 30 years beleaguered residents are escaping into Afghanistan and not out of it, an irony not lost on local officials or refugee agencies. Picture taken on July 2, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
Displaced Pakistani children play outside their tent at a refugee camp in Khost province
Displaced Pakistani children play outside their tent at a refugee camp in Khost province July 2, 2014. Thousands of refugees fleeing an offensive by Pakistan's army have poured across the lawless border into ramshackle camps on rugged hills in Afghanistan. The mass departures over the porous border, which many in any case do not recognise, mark a change. For the first time in more than 30 years beleaguered residents are escaping into Afghanistan and not out of it, an irony not lost on local officials or refugee agencies. Picture taken on July 2, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
Displaced Pakistani children play outside their tent at a refugee camp in Khost province
Displaced Pakistani children play outside their tent at a refugee camp in Khost province July 2, 2014. Thousands of refugees fleeing an offensive by Pakistan's army have poured across the lawless border into ramshackle camps on rugged hills in Afghanistan. The mass departures over the porous border, which many in any case do not recognise, mark a change. For the first time in more than 30 years beleaguered residents are escaping into Afghanistan and not out of it, an irony not lost on local officials or refugee agencies. Picture taken on July 2, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
A general view of a refugee camp for displaced Pakistanis in Khost province
A general view of a refugee camp for displaced Pakistanis in Khost province July 2, 2014. Thousands of refugees fleeing an offensive by Pakistan's army have poured across the lawless border into ramshackle camps on rugged hills in Afghanistan. The mass departures over the porous border, which many in any case do not recognise, mark a change. For the first time in more than 30 years beleaguered residents are escaping into Afghanistan and not out of it, an irony not lost on local officials or refugee agencies. Picture taken on July 2, 2014. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
Pakistan fighting reverses flow of refugees, stirs unease in Afghanistan
Some 3.8 million Afghans have returned to Afghanistan since Taliban were ousted in 2001
A man looks out from a broken glass window after an explosion near a mosque in Karachi
A man looks out from a broken glass window after an explosion near a mosque in Karachi July 4, 2014. According to local media, at least two people were killed and several injured after the explosion occurred in Karachi's Saddar neighbourhood on Friday. REUTERS/Akhtar Soomro (PAKISTAN - Tags: CIVIL UNREST POLITICS TPX IMAGES OF THE DAY)
A paramilitary soldier stands guard outside the cordoned area after an explosion near a mosque in Karachi
A paramilitary soldier stands guard outside the cordoned area after an explosion near a mosque in Karachi July 4, 2014. According to local media, at least two people were killed and several injured after the explosion occurred in Karachi's Saddar neighbourhood on Friday. REUTERS/Akhtar Soomro (PAKISTAN - Tags: CIVIL UNREST MILITARY POLITICS)
A man looks out from a broken glass window after an explosion near a mosque in Karachi
A man looks out from a broken glass window after an explosion near a mosque in Karachi July 4, 2014. According to local media, at least two people were killed and several injured after the explosion occurred in Karachi's Saddar neighbourhood on Friday. REUTERS/Akhtar Soomro (PAKISTAN - Tags: CIVIL UNREST POLITICS)