CAMP VICENTE LIM, Laguna: Police Regional Office in Calabarzon (Cavite, Laguna Batangas, Rizal and Quezon) deployed on Monday a battalion-size contingent to Marawi City to help in the on-going operation against the Maute Group. Regional Director, Chief Supt. Mao Aplasca, said the contingent is from the Regional Public Safety Batallion (RPSB) based in Camp Macario Sakay in Los Baños town. The contingent is led by Chief Insp. Crispin Mangupag and nine other officers. Aplasca added the RPSB is considered a tactical unit since they were trained in urban warfare and internal security operations. The RPSB has been deployed previously in Lanao del Sur and Maguindanao as peacekeeping force during the national and local elections where they had successful missions.