Russian oil deliveries to Slovakia through the Druzhba pipeline that crosses Ukraine resumed early Thursday morning after a three-month suspension, Slovak Economy Minister Denisa Saková announced.

The oil flow restarted at 2 a.m. Thursday, ending a supply disruption that began in January and had escalated diplomatic tensions between Ukraine and two EU member states that remain dependent on Russian energy.

Both Hungary and Slovakia accused Ukraine of failing to repair damage to the pipeline infrastructure that caused the supply halt. The two countries, unlike most other European Union members, continue to rely heavily on Russia for their energy needs despite the ongoing war in Ukraine.

The supply disruption had significant political ramifications beyond energy concerns. Hungary blocked a substantial EU loan package intended for war-torn Ukraine, while Slovakia refused to endorse new sanctions against Russia until oil deliveries resumed.

The Druzhba pipeline system has served as a critical energy lifeline for several European countries, though most EU members have moved to reduce their dependence on Russian energy imports since the invasion of Ukraine began in February 2022.

The resumption of oil flows comes as European officials continue to navigate the complex relationship between supporting Ukraine militarily and financially while managing ongoing energy dependencies that predate the current conflict.