The Czech Foreign Ministry is prepared to send a special envoy to Zambia to attend to the case of three Czechs detained in the country on charges of alleged espionage, should the matter get more complicated, a spokesman for the ministry said on Monday. According to him Foreign Minister Karel Schwarzenberg has been attempting to get in touch with his Zambian counterpart for several days without success. The three Czechs were arrested in the Zambian capital Lusaka in mid-October and charged with espionage after taking photos the local police found suspicious. The Czech tourists deny the charges. If sentenced they face up to 25 years in prison.