German prosecutors say a man who was arrested last month as a suspected accomplice in a Syrian compatriot's alleged bomb plot has been released.

The 33-year-old, identified only as Khalil A., had been accused of helping main suspect Jaber Albakr plan what authorities believe was an intended attack using homemade explosives on one of Berlin's airports. Police found explosives hidden at Khalil A.'s apartment in Chemnitz.

However, federal prosecutors said Monday that the investigation hadn't produced evidence to substantiate the case against Khalil A. He was released on Sunday.

Albakr was arrested with the help of three other fellow Syrians in Leipzig nearly two days after he evaded police in Chemnitz. He strangled himself in his jail cell a few days later.