On the morning of 27 March, two recon Marines found a sunken M1A1 tank at the bottom of the river. The tank had been missing since the night of 24–25 March. It had apparently plunged into the river when it drove through a gap where a sidewalk was under construction, causing the exposed reinforcing bar to crumble under the weight. The entire four-man crew died. Navy Seabee divers from Underwater Construction Team TWO, part of Task Force MIKE along with Marines from 1st Tank Battalion, spent two days retrieving the flooded tank and the bodies of the four crewmen that were found inside.