Afghan authorities and people of southern Afghanistan say they are witnessing an upsurge in suicide attacks.<br /><br />They blame Pakistan for failing to stop an influx of Taliban fighters.<br /><br />But there are vast tracts of land between Pakistan and Afghanistan where border control barely exists.<br /><br />Nato is speaking out against a peace deal between the Taliban and the Pakistani government. <br /><br />The organisation says the truce in the North-West Frontier Province has already led to a rise in violence across the border in Afghanistan. <br /><br />In a rare news conference, the Taliban's leader in Pakistan, Baitullah Mehsud, vowed to keep sending suicide bombers to kill US troops in Afghanistan. <br /><br />Al Jazeera's Teresa Bo reports from the Afghan town of Spin Boldak, on the historic issues that make border policing difficult.
