kabul afghan taliban say monday kevin king one two professors american university afghanistan kidnap kabul last year seriously ill need urgent medical attention taliban spokesman zabihullah mujahid say king american suffer dangerous heart disease kidney problems illness intensify feet swell sometimes become unconscious condition worsen every day mujahid say statement try treat time time medical facilities war situation say u.s. state department call immediate unconditional release king hostages king australian colleague timothy weeks kidnap august 2016 return compound afghan capital afghan western officials believe men hold haqqani network militant group affiliate taliban carry many kidnappings acknowledge unsuccessful rescue attempt make eastern afghanistan months two take taliban statement come around two weeks pakistani troop rescue canadian joshua boyle american wife caitlan coleman area near afghan border hold haqqanis since kidnap 2012. early year taliban release video king weeks show plead governments release taliban prisoners turn freedom kidnap high profile target become lucrative business taliban militant group afghanistan return often demand huge ransom release members afghan taliban say kidnap u.s. professor seriously ill