The Thai government's Department of Special Investigation (DSI) will add a terrorism charge against nine anti-government core leaders when they surrender on May 15 to fight charges of violating the emergency decree, DSI Director- General Tharit Pendit said Thursday. The nine anti-government core leaders include Veera Musikhapong, Jatuporn Prompan, Natthawut Saikua, Weng Tojirakarn, Suporn Atthawong, Maj-General Khattiya Sawasdipol, Kwanchai Praipana, Arisman Pongruangrong and Pol Lt-Col Waipot Arpornrat, the Thai News Agency reported. Recently, the nine 'red-shirt' core leaders announced they plan to surrender to involved authorities on May 15 to fight the charges of violating the emergency decree. However, the nine anti-government core leaders will additionally be charged with terrorism, Tharit said. The 'red-shirt' anti-government rally has been held from March 12 and they are now gathering at the Rathchaprasong Intersection in the center of capital Bangkok. Totally, 27 people lost their lives and some 1,427 were wounded during the recent four major clashes between the 'red-shirt' protestors and security forces, Public Health Minister Jurin Laksanawisit said on May 3. 