A former prime minister of Kosovo arrested in Bulgaria is to be kept in custody until at least Saturday.Agim Ceku was detained yesterday on an Interpol arrest warrant issued by Serbia for alleged war crimes. The Kosovo government has urged Interpol and other countries to ignore Belgrade’s warrant, but Bulgaria says it is willing to hold an extradition hearing. Kosovo’s Deputy Prime Minister, Hajredin Kuci, said: “We don’t think Bulgarian diplomacy did this with the aim of downgrading any of Kosovo’s personalities. I’m convinced the Bulgarian leadership is aware that political motives are behind these accusations.” Ceku was a commander of Kosovo Albanian fighters during the 1988-99 war. Serbia accuses him of war crimes in Kosovo and also during the war in Croatia. The Bulgarian judges have requested the details of the accusations as they consider Serbia’s extradition request. This is the fourth time Ceku has been stopped in several countries, but he has never been handed over to Belgrade. Bulgaria is one of 60 countries that recognise Kosovo’s self-declared independence.