German investigators have not abandoned the possibility of a political motive in the killing of two Ukrainian soldiers in Bavaria at the weekend, allegedly at the hands of a Russian citizen who is in police custody. "The motive for the crime is currently still unclear, although a political motivation cannot be ruled out and is being investigated in all directions," the public prosecutor general's office in Munich said on Monday after it took over the case. The two men, aged 23 and 36, were stabb