The body of a 17-year-old teenager has been recovered from the rubble following an explosion in a residential building in the southern German city of Memmingen, a police spokesman said early Saturday. Rescue forces found the dead boy in a neighbouring house which was also severely damaged in the blast, the spokesman said. It was initially unclear what had caused the explosion which occurred at approximately 5.20 pm (1520 GMT) on Friday afternoon. The house where it occurred has been reduced to rubble. A 68-year-old resident had not been home at the time of the blast and police later found him …