German investigators have concluded that the suspect device discovered in luggage in proximity of an Air Berlin aircraft in Namibia was part of a security test.
The luggage item was discovered at Windhoek, close to a Munich-bound Airbus A330 operated by Air Berlin's LTU division.
But a spokesman from the German interior ministry says: "Experts from the [German federal police] were sent to Windhoek. They have inspected the device and found it to be a test device."
German law-enforcement authority Bundeskriminalamt would not comment further on the origin of the device.
It had indicated that it contained several suspicious components, including batteries and a detonator, although the authority did not mention explosives. Air Berlin had already pointed out that the luggage item was unlabelled.