At daybreak on 8 August, six Japanese infiltrators hiding under the porch of the former British colonial headquarters shot and killed three Marines. Within five minutes, other Marines killed the six Japanese with grenades. Later that morning, the Marines, after landing reinforcements in the form of the 2nd Battalion, 2nd Marines (2/2), surrounded Hill 281 and the ravine, pounded both locations with mortar fire throughout the morning, and then assaulted the two positions, using improvised explosive charges to kill the Japanese defenders taking cover in the many caves and fighting positions throughout the hill and ravine. The individual Japanese fighting positions were destroyed with these improvised explosives. Significant Japanese resistance ended by the afternoon, although a few stragglers were found and killed over the next several days. In the battle for Tulagi, 307 Japanese and 45 U.S. troops died. Three Japanese soldiers were taken prisoner.