Doubts about letters claiming Islamist motive for German attack: prosecutors (Reuters)

By Michelle Martin BERLIN (Reuters) - German prosecutors have doubts about the authenticity of letters that suggested Islamist militants attacked soccer team Borussia Dortmund's bus and a newspaper cited an investigator as saying right-wing extremists were probably behind the bomb attack. Three identical letters printed in German found near the scene of Tuesday's attack in Dortmund had stated it was carried out "in the name of Allah", broadcaster ARD reported, citing other media. The letters referred to the use of Tornado reconnaissance planes in Syria, which Germany has deployed as part of the military campaign against Islamic State.