This master's thesis examines the importance of the explosion incident at Nord Stream and Russia’s full-scale invasion of Ukraine on Sweden’s security sectors. The critical energy project Nord Stream 1 and its expansion to Nord Stream 2 have created bipolar attitudes and debates in Sweden and the EU regarding the security implications of increased Russian power. The Ukraine war and the physical attack on the pipelines have only amplified security concerns in the international political arena. This thesis aims to provide a descriptive understanding of the explosion incident and Russia’s aggressive actions in Ukraine and their resulting impact on Sweden’s ability to establish a stable security strategy viewed by security sectors such as national-, environmental-, energy-, military-, economic-, human-, and societal-security. Additionally, this thesis also explores these issues from Sweden’s perspective with the use of classic international relations perspectives such as realism and liberalism. Results present that the security sector reports heightened tensions, with Russia potentially increasing military activities. New intensified threat perception for Sweden, negative environmental impacts, affecting on human health and security. Effects regarding energy security. New security threats for Russia's establishment within the European market, impact and effects on nations' identity and uncertainty about the new political situation, and increased insecurity for essential societal infrastructures.