The tank fired a HEAT round at the balcony, killing Protsyuk and Couso. Prior to the incident, no one in the 4-64 had been briefed about the Palestine Hotel or its location, since the hotel was not in their sector (the east bank of the Tigris was allocated to the 1st Marine Division). U.S. forces later determined that the Iraqi artillery spotter was probably in a nearby building, not the hotel.[1]