At 1005 hrs on May 10, 1969 (Late Entry) Alpha Company 4-3 Infantry 2nd Platoon at BS617427 had 2 US KHA and 2 US WHA caused by indirect fire type (short round)unknown. Personnel involved KHA Smith, Charles PFC and Williamson, Ervin PFC and WHA Vann, Joseph SP4, Robenson, Earnest PFC Dust Off was requested and completed at 0913 hrs.