An Afghan border policeman prepares ammunition at a check post at Goshta
An Afghan border policeman prepares ammunition at a check post at the Goshta district of Nangarhar province, where Afghanistan shares borders with Pakistan, May 2, 2013. An Afghan border policeman was killed and two Pakistani soldiers were wounded in an exchange of fire along the border late on Wednesday, officials from both countries said, in a clash likely to unsettle already troubled ties between the neighbours. REUTERS/Parwiz (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
Afghan border policemen take their positions at Goshta
Afghan border policemen take their positions at the Goshta district of Nangarhar province border, where Afghanistan shares borders with Pakistan, May 2, 2013. An Afghan border policeman was killed and two Pakistani soldiers were wounded in an exchange of fire along the border late on Wednesday, officials from both countries said, in a clash likely to unsettle already troubled ties between the neighbours. REUTERS/Parwiz (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
A Pakistani flag flies on top of a Pakistani check post at Goshta
A Pakistani flag flies on top of a Pakistani check post at the Goshta district of Nangarhar province, where Afghanistan shares borders with Pakistan, May 2, 2013. An Afghan border policeman was killed and two Pakistani soldiers were wounded in an exchange of fire along the border late on Wednesday, officials from both countries said, in a clash likely to unsettle already troubled ties between the neighbours. REUTERS/Parwiz (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
An Afghan border policeman takes position at Goshta
An Afghan border policeman takes position at the Goshta district of Nangarhar province border, where Afghanistan shares borders with Pakistan, May 2, 2013. An Afghan border policeman was killed and two Pakistani soldiers were wounded in an exchange of fire along the border late on Wednesday, officials from both countries said, in a clash likely to unsettle already troubled ties between the neighbours. REUTERS/Parwiz (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
An Afghan border policeman keeps watch at a check post at Goshta
An Afghan border policeman keeps watch at a check post at the Goshta district of Nangarhar province, where Afghanistan shares borders with Pakistan, May 2, 2013. An Afghan border policeman was killed and two Pakistani soldiers were wounded in an exchange of fire along the border late on Wednesday, officials from both countries said, in a clash likely to unsettle already troubled ties between the neighbours. REUTERS/Parwiz (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
Afghan border policemen take their positions at Goshta
Afghan border policemen take their positions at the Goshta district of Nangarhar province border, where Afghanistan shares borders with Pakistan, May 2, 2013. An Afghan border policeman was killed and two Pakistani soldiers were wounded in an exchange of fire along the border late on Wednesday, officials from both countries said, in a clash likely to unsettle already troubled ties between the neighbours. REUTERS/Parwiz (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
Afghan border policemen sit at the back of police vehicle at Goshta
Afghan border policemen sit at the back of police vehicle at the Goshta district of Nangarhar province, where Afghanistan shares border with Pakistan, May 2, 2013. An Afghan border policeman was killed and two Pakistani soldiers were wounded in an exchange of fire along the border late on Wednesday, officials from both countries said, in a clash likely to unsettle already troubled ties between the neighbours. REUTERS/Parwiz (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)
A demonstrator jumps over a burning effigy depicting Pakistani President Ali Zardari, during protest after death of Sarabjit Singh, in Kolkata
A demonstrator jumps over a burning effigy depicting Pakistani President Asif Ali Zardari, during a protest after the death of Sarabjit Singh, who was convicted of spying for India and sentenced to death in Pakistan, in Kolkata May 2, 2013. India reacted furiously to Thursday's death in a Pakistani jail of an Indian farmer convicted of spying who was badly beaten last week by fellow inmates, the latest incident to strain relations between the neighbours. Singh was arrested in Pakistan in 1991 and sentenced to death for spying and carrying out four bomb blasts that killed 14 people. His family says he was an innocent farmer who was arrested after drunkenly wandering over the border. REUTERS/Rupak De Chowdhuri (INDIA - Tags: POLITICS CIVIL UNREST CRIME LAW)
An Air India aircraft arrives from India to transport back the body of Sarabjit Singh, in Lahore
An Air India aircraft is parked at Allama Iqbal International airport, arriving from India to transport back the body of Sarabjit Singh, convicted of spying for India and sentenced to death in Pakistan, in Lahore May 2, 2013. India reacted furiously to Thursday's death in a Pakistani jail of the Indian farmer convicted of spying who was badly beaten last week by fellow inmates, the latest incident to strain relations between the neighbours. Singh was arrested in Pakistan in 1991 and sentenced to death for spying and carrying out four bomb blasts that killed 14 people. His family says he was an innocent farmer who was arrested after drunkenly wandering over the border. REUTERS/Mani Rana (PAKISTAN - Tags: POLITICS CIVIL UNREST CRIME LAW TRANSPORT)
Pakistan, Afghan forces in high-stakes clash along border
PAKISTAN-AFGHANISTAN/ (UPDATE 3, TV, PIX):UPDATE 3-Pakistan, Afghan forces in high-stakes clash along border