A helicopter delivering essential supplies Mungindi, cut off by floodwaters, has been "targeted" by people hitting golf balls at it on two separate occassions.
New England police are urging the public to come forward with information after a chopper being used by the State Emergency Service (SES) was damaged.
The helicopter had been delivering supplies to the town - which has been surrounded by floodwater for days - when it was targeted during takeoff from the Mungindi football fields on both Saturday and Monday.
"Over the past fortnight the SES, along with other emergency services, have provided an outstanding service to flood-ravaged communities in our area," Acting Superintendent Cooper said.
"The SES continues to send in helicopters twice-a-day to stock up supplies for isolated towns and those in more remote locations including Mungindi.
"For members of this community to target those trying to help them is extremely disappointing."
Acting Superintendent Cooper warned hitting golf balls at the chopper could have had "very dire consequences" for its crew and for people on the ground.
Police claim golf balls were whacked at the chopper about 9.30am on Saturday and again on Monday.
They said damage was done to the aircraft's exterior during the incident on Easter Saturday.
The Mungindi community and surrounding properties have been cut off from the rest of the world by rising floodwater, with a major flood peak in the Barwon River expected to hit town on Tuesday.
Officers are calling on anyone who may have witnessed suspicious activity near the Mungindi football fields or who knows who might be involved to contact police.