In Afghanistan, the death toll from a fuel tanker explosion in a tunnel north of the capital, Kabul, has risen to 31.<br />'' <br />'' A Health Ministry spokesman said the number of fatalities climbed to 31 while 37 people were injured. He said, rescuers continued to search for survivors trapped under rubble.<br />'' <br />''The Salang tunnel, about 130 km north of Kabul, which was originally built in the 1960s, which is a key route linking the country's north and south.