UPDATE: Police investigating ‘white powder’ found on board Qantas aircraft in Melbourne

The Australian Federal Police are investigating a “white powder substance” found in the cargo hold of a Qantas aircraft at Melbourne airport this morning.

HAZMAT crews at Melbourne airport. (9NEWS)

The Australian Federal Police are investigating a “white powder substance” found in the cargo hold of a Qantas aircraft at Melbourne airport this morning.

Police and HAZMAT crews were called to the airport and secured the scene before removing the substance for testing.

AFP and Customs are now leading the investigation but the incident is no longer considered an emergency situation.

Maintenance crew are understood to have found the substance. (9NEWS)

An AFP spokesman declined to comment on the matter because it is still an ongoing investigation.

The aircraft had flown from Sydney last night and was not due for any operations until later this morning.

A Qantas spokesman has said the aircraft was scheduled for maintenance this morning.

The incident is not expected to affect other flights, although there were significant traffic delays around the airport earlier this morning.

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