Dutch Martin B-10 bombers attacked Japanese shipping from their base, 'Singkawang II' at Miri, on 17 December, but their attempt failed. The three Dornier Do 24Ks followed up with their own attack, but one was shot down, possibly by a floatplane from "Kamikawa Maru". The remaining two, benefiting from cloud cover, were never seen by the Japanese. One flying boat scored two 200 kg bomb hits on , causing a massive explosion, while a near miss ruptured its hull plating. The destroyer's stern broke off and the ship sank within minutes. The last flying boat dropped its bombs on a freighter, but missed. The B-10 bombers made attacks at Miri 18 and 19 December, but retired to Sumatra on 23 December since Singkawang II airfield was discovered by the Japanese, who began attacking it the same day.