Germany's federal police chief says the two Lebanese suspects in a failed plot to blow up German passenger trains late last month initially fled to Lebanon.

Authorities arrested one suspect on Saturday in the northern German city of Kiel, and they say the second person remains at large.

Chief Joerg Ziercke discussed the case Wednesday on German television. He says it is not clear whether the second suspect, 20-year-old Jihad Hamad, ever returned from Lebanon. Federal prosecutors said on Tuesday they would seek an arrest warrant against him on charges of attempted murder and membership in a terrorist group.

On Monday, prosecutors in the German town of Karlsruhe credited Lebanese officials with information that led to the arrest of the fugitive's 21-year-old alleged accomplice. That suspect is identified as Youssef Mohammed E.H.  Police captured him early Saturday.

Police say the two men planted two suitcases containing homemade bombs on trains traveling between Dortmund and Koblenz on July 31. The bombs failed to explode.

Some information for this report was provided by AFP, AP and Reuters.