The second main suspect in a failed plot to bomb two German trains turned himself in to authorities in his native Lebanon on Thursday, German federal prosecutors said. Jihad Hamad, 20, was arrested in the morning after turning himself in to police in Tripoli, prosecutors said in a statement. The other main suspect, a 21-year-old Lebanese student identified as Youssef Mohamad el Hajdib, was arrested in Germany on Saturday. The men are suspected of planting crude bombs July 31 on two trains at Cologne station, where they were seen in grainy surveillance camera footage pulling wheeled suitcases. The detonators on the bombs went off, but failed to ignite the devices, authorities have said. The bombs were found later in the day on regional trains in Koblenz and Dortmund. El Hajdib's arrest came after a tip-off from Lebanese intelligence, according to German authorities. It was not immediately clear whether they were also involved in Hamad's decision to turn himself in.