Japanese naval force sighted off Sarawak according to the U.S. Joint Intelligence Committee. Daily summary dated 18 December 1941

An item referred to CinC Br. Fe. Fleet reporting that aircraft sighted off Miri [Sarawak-British Borneo] 1 battleship, 1 cruiser and 3 destroyers. M/A London reported that Japanese naval parties landed north off Miri.

Source

Map Room Papers (Roosevelt Administration) mr0422a. U.S. Joint Intelligence Committee. Daily summary No. 8 dated 18 December 1941.