The rocket fire targeting American forces often originates within sight of border posts manned by Pakistan's Frontier Corps, said Lieutenant General Curtis Scaparrotti, deputy commander of the NATO-led force in Afghanistan. "In some locations from time to time you will see what just appears to us to be a collaboration... or at a minimum a looking the other way when insurgents conducted rocket or mortar fire in what we believe to be (within) visual sight of one of their (Pakistan military) posts," Scaparrotti told reporters via video link from Kabul. Soldiers from the Pakistani Frontier Corps are locally recruited and not as highly trained as regular army units, he said. The cross-border attacks have increased dramatically in eastern Paktika province in recent months, with rocket and other fire four times higher than in previous years. "We talk very bluntly with our Pakistani counterparts about this," Scaparotti said. The rocket fire has coincided with a virtual breakdown in communications between US and Pakistani officers along the border since May. A year ago, it was common to have radio communications between Afghan and NATO forces and Pakistan's Frontier Corps stationed along the border, as well as quarterly planning conferences among officers, the general said. But Scaparrotti said he had recently paid a visit across the border to confer with his military counterparts near the border and was hopeful that regular communications could be restored between units on both sides of the border.