At dawn Saturday, soldiers surrounded the suspected kidnappers in the nearby village of Deir al-Wasaa, sparking a firefight that killed a soldier and a gunman, officials said. There were no immediate reports of arrests.
All officials spoke on condition of anonymity as they were not authorized to publicly speak to journalists.
Clans in the valley often use hostage-taking as a method of resolving conflicts, though it's unusual for foreigners to be kidnapped. The last major kidnapping involving foreigners in Lebanon was in March 2011, when seven Estonian bike riders were abducted. They were released four months later.
The Germans are being held for questioning, officials said. Germany's Foreign Ministry said in a statement Saturday that they were in contact with their nationals and confirmed the two were being held by police. It had no further comment.
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Associated Press writer Frank Jordans in Berlin contributed to this report.