Complex sentence: Standing by the Austro-Hungarian Bank, Mehmedbašić did however not take action; he later said that a policeman was standing behind him and he feared he would be arrested before he had a chance to throw his bomb.
Split into simpler sentences: Standing by the Austro-Hungarian Bank, but Mehmedbašić did not take action. Mehmedbašić later said that a policeman was standing behind him and he feared he would be arrested before he had a chance to throw his bomb.