Two of the 14 Cubans who sought refuge in Czechoslovakia's embassy in Havana earlier this week have left the mission, the Foreign Ministry said today. According to a report carried by the state CTK news agency, one refugee left without notifying the embassy and the other asked to be released. The two apparently left without explanation. ``They left Friday afternoon, sometime between 4 and 4:30 p.m. local time,'' said Marcel Cintalan, a Foreign Ministry official. ``We don`t know why. They did not give any reasons.'' A senior official said Friday that Czechoslovakia would not turn the Cuban refugees in the Havana embassy over to authorities and that Prague was prepared for long and complicated talks over their fate. Three other asylum-seekers have sought refuge in Spain's Havana embassy. The Czechoslovak deputy foreign minister, Lubos Dobrovsky, met with Cuban Ambassador Mario Rodriguez Martinez Friday and asked Cuba to grant the refugees free passage. Dobrovsky also met with senior Soviet, West German and Italian diplomats to seek their help in resolving the situation. Tension has been growing between the two former Communist allies since a democratic revolution swept Czechoslovakia's Communist rulers from power last winter. Earlier this week, Prague said it suspected the influx of Cuban refugees might be a deliberate provocation by Havana to underline the growing strain between the nations.