BHP Group BHP.AX and Rio Tinto RIO.AX both fell 0.3% each. By Ayushman Ojha June 26 (Reuters) - Australian shares closed at their lowest level in nearly three months on Monday, dragged by banking and commodity stocks, while investors awaited local inflation data due later in the week for cues on future monetary policy. Miners .AXMM ended 0.3% lower, pressured by mounting supply and weak downstream demand in top consumer China.