Munich based magazine “Focus” reported on Saturday that about 15 Germans are fighting for Al Shabab in Somalia.
The magazine claimed that six residents of the western city of Bonn were alleged to fight for Al Shabab upon their return from Somalia.
The investigation includes 30 German travelers who went to the Horn of Africa between 2008-2014 to join al Shabab, a terrorist group accused of setting several deadly attacks in Somalia and neighboring countries such as Kenya.
Al Shabab has been classified among terrorist groups by the United States since 2008 and has launched high profile attacks since then, including successful attacks on UN vehicles and Educational Ministry of Somalia.
Focus reported that five of the accused in Bonn were trained how to use heavy firearms and hand grenades by al-Shabab and were sent to the front to fight against troops from Somalia's army.
Some of them apparently planned to die in suicide bombings and had recorded farewell videos.
Al Shabab has killed Abdifatah Barre, the deputy district commissioner of Mogadishu’s Wadajir district, in Mogadishu earlier in May, before bombing an African Union troop convoy outside the capital.
The attacks came during the surprise visit of US Secretary of State, John Kerry.
A senior US State Department official had told reporters that they would not turn their backs on the Somali people and they were going to engage with Somalia until they would bring Al Shabab terror to an end before the attacks.