June 18 (Reuters) - Australian shares were likely to drop on Thursday, as doubts over the U.S.-Iran peace deal rose after U.S. President Donald Trump said the new ceasefire was not final and the Iran war could still resume, subduing risk appetite.

The local share price index futures YAPcm1 fell 0.7%, a 57.3-point discount to the underlying S&P/ASX 200 index .AXJO close. The benchmark ended 0.5% higher on Wednesday.

New Zealand's benchmark S&P/NZX 50 index .NZ50 fell 0.1% to 13,380.12 in early trade.

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