(CNN) -- Six members of NATO's International Security Assistance Force died Monday, four in a helicopter crash and two in unrelated roadside bombings, military officials said.
The helicopter crash occurred in southern Afghanistan's Kandahar province.
The dead included three Australian service members, according to Australian defense force chief Marshal Houston. Houston said 10 Australians were among the 15 people on board a coalition chopper taking part in military operations.
"This was not the result of enemy action," Houston said.
An ISAF soldier from another country also was killed, Australian Minister for Defense John Faulkner said. Australia lost two soldiers in a roadside bombing earlier this month. Sixteen Australians have died during operations in Afghanistan since 2001.
No further information was available on the two ISAF service members who died in separate incidents in southern Afghanistan involving improvised explosive devices.
It is ISAF policy to defer casualty identifications to the countries from which the service members died.
CNN's Hugh Williams contributed to this report.