The funeral has taken place in South Korea of the second of a group of hostages from the country to be killed by the Taliban in Afghanistan. Shim Seong-min was shot by his captors after they accused the Afghan government of not negotiating in good faith on their demands for the release of Taliban prisoners. During the cereomy the father of the 29-year-old prayed for the safe return of the remaining 21 hostages. The group of Christian aid workers were seized almost three weeks ago. Their leader was the first to be killed. Two of the captives are said to be seriously ill and talks are continuing to allow local doctors to visit them. The South Korean government has told the Taliban there is a limit to what it can do to resolve the standoff. The Afghan government has so far refused to agree to the release of Taliban prisoners in exchange for the hostages. It says that would encourage further kidnappings.