Russia’s Federal Security Service (FSB) has reported the arrest of a German citizen allegedly fighting as a mercenary for Ukraine. The individual was reportedly detained within Russia. According to the FSB, the mercenary deserted his post due to a lack of payment. Details surrounding the circumstances of his capture and current legal status remain limited. This incident highlights the continued presence of foreign fighters within the conflict in Ukraine, and potential issues regarding their compensation. The FSB’s announcement follows a series of reports regarding foreign nationals joining the Ukrainian armed forces. Further investigation is underway by Russian authorities regarding the detainee’s activities.