In Afghanistan, a pilot and two soldiers were killed when a helicopter contracted by NATO crashed inside an army base today.<br />''  <br />'' An army spokesman said three others injured when the helicopter crashed shortly after takeoff from the base near the northern city of Mazar-i-Sharif. He said, the crash was caused by a technical problem and the helicopter caught fire after it hit the ground. <br />''  <br />'' Seven other security forces on board the helicopter were rescued. <br />'' <br />