"Hybrid threats" is a term that designates antagonistic subversion by state or proxy actors below the threshold of conventional warfare. It has become increasingly important in Swedish security policy. This report presents a framework that the Swedish Police Authority can use in the development of a comprehensive strategy for countering hybrid threats. It discusses the institutions that already exists to mitigate such threats, and then presents three ideal typical strategies - in terms of overarching plans of action - for countering hybrid threats. The three strategies are the protective strategy, the bolstering strategy, and the disruptive strategy. Using these strategies as a starting point, the report discusses different ways to counter vague and opaque threats posed by antagonist states.