There have been flight delays at Melbourne Airport because of a technical problem with the control tower.

Airservices Australia says there was a data fault in the digital tower technology system which has now been reset.

The agency denied reports the tower has lost power.

Airservices says they will monitor the system this afternoon to ensure it is operating normally.

The problem was isolated to the Melbourne control tower and other systems, including terminal control units, were not affected.

Flights were suspended for a short time but have now resumed.

As a safety precaution, all traffic into and out of the airport was slowed down.

Airservices Australia is working with the airlines to return to normal schedules as soon as possible.

Passengers have been warned to expect delays throughout the day as the backlog is cleared.