The bodies of three foreign tourists, murdered in northern Yemen, have been flown back to the capital Sanaa. Two of them were German nurses, the third was a South Korean teacher. The women are thought to have been shot at close range. They were in a party of nine who disappeared last Friday.The governor of the region where their remains were found has put up a reward worth 18,000 euros for information leading to the kidnappers. Authorities are still searching for the remaining six tourists who include a British engineer and three German children. Germany’s Chancellor, Angela Merkel, said: “This is very sad news and we condemn these acts in the strongest terms. Our thoughts are with the families of the victims. The foreign ministry crisis centre is trying to get news of the other hostages, but there is no concrete information yet.” The group was abducted in the remote Saada province. They are believed to have been working for a Dutch medical charity. One analyst said it is possible that the killings were the work of al-Qaeda militants. Yemeni authorities are also struggling against a rebellion in the north and a breakaway movement in the south.