Seven people were arrested in Albania on Saturday and yet another was being sought yesterday in connection with the alleged murder of an ethnic Greek man that prompted the Foreign Ministry in Athens to demand «proper and swift justice.» Aristotelis Goumas, 35, was allegedly run over and killed by men in a car after he fled an argument in the town of Himara on his motorbike. Himara has a strong presence of ethnic Greeks – or northern Epirotes as they are known in Greece. «Unacceptable criminal acts such as this are designed to inflame ethnic tension with unpredictable consequences and to undermine Greek-Albanian relations,» Greek Foreign Ministry spokesman Grigoris Delavekouras said. Albanian Prime Minister Sali Berisha called the killing a «barbarous act» for which those responsible should be caught and brought to justice. Authorities in Albania said that seven people, aged 19 to 22, had been arrested but the driver of the vehicle, named as Ilir Mukaj, was still being sought.