Japanese active on the Perak and Berman rivers in Malata according to the U.S. Joint Intelligence Committee. Daily summary dated 3 January 1942

An item reported that in western Malaya small Japanese boats active on the lower reaches of the Perak and Bernam rivers were a constant threat for the British left flank.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 24 dated 3 January 1942