This, from the ABC news....
ABC News online
Police probe Darwin airport security threat
Northern Territory police are investigating a security threat that forced the closure of the Darwin International Airport overnight.
Police evacuated the airport and closed all access roads at about 9:30pm ACST after an airline received a threatening telephone call.
The airport was closed for more than three hours during a peak traffic period, causing significant delays to passengers travelling to and from Darwin.
Darwin watch commander Bob Harrison says the airport had to be closed to allow enough time to search the area.
"Because of the nature of the threat and because it's such a large area, we had to be very sure before we let people back into the area that it has been thoroughly searched and it's been cleared," he said.
"And we're not going to do anything half-hearted, we're going to do it thoroughly, so that's why it took so long."
Passengers who were left stranded by last night's closure say they were frustrated at a lack of information provided and a lack of water.
Many people were left waiting on roads heading into the airport while the airport was cleared.
GG