The DI operation was suspended upon the surrender of the Commonwealth Government to the occupying Japanese forces during World War II. The Japanese, however, revived the DI and allowed it to function as a division under the Department of Justice until the establishment of the Japanese puppet Philippine Republic of President José P. Laurel. During the Laurel administration, the DI was merged with the Secret Service Division of the Metropolitan Constabulary (Manila Police Department or MPD) and the Intelligence Unit of the Japanese-run Philippine Constabulary.