Yes, it is possible with EU Member States. With third countries it is possible based on bilateral police agreements. In a matter which is the subject of pre-trial criminal proceedings, an investigation, or judicial proceedings in one or several Member States, the police may, when executing tasks and measures in the course of pre-trial criminal proceedings, or an investigation falling within their authority under the provisions of the law governing criminal procedure, cooperate with police officers of another Member State within or outside the territory of the Republic of Slovenia.