Dutch aircraft attacked with success Japanse cruisers off Serawak according to the U.S. Joint Intelligence Committee. Daily summary dated 21 December 1941

An item referred to unconfirmed press items reporting that Dutch aircraft within the past 36 hours damaged 3 Japanese cruisers off Serawak and destroying 2 seaplanes and 2 transports with the loss of one bomber.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 11 dated 21 December 1941.