Major Czech tour operators, including Cedok and Alexandria, plan to invest heavily in Bulgaria's Southern coast, it emerged on Friday. Bulgaria and the Czech Republic are expected to sign an agreement for cooperation in the tourism sector by the end of May. Czech tourists to visit Bulgaria are projected to increase by 30% in 2005, keeping up the trend of the last three years. More than 100,000 Czech tourists visited Bulgaria in 2004, up by 30.17% over the previous year.