HAMBURG, Germany — A suspicious package found in a Namibian airport near bags of a flight bound for Munich, which prompted fears Germany  was being targeted in a terrorist attack, was a device designed to test security and didn't contain explosives, a senior official said Friday.

Wednesday's find at the Windhoek airport came the same day that Interior Minister Thomas de Maiziere had raised Germany's internal terrorist alert level, and amid the heightened security situation Germany immediately sent federal agents from South Africa to help local officials in their investigation.

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