Russian oil supplies to Hungary and Slovakia via the Drujba pipeline have resumed after a disruption caused last week by a Ukrainian attack in Russia, Hungarian oil group MOL and the Slovak economy minister said, Reuters reports.

Unlike other European Union countries, Slovakia and Hungary have remained dependent on Russian energy and obtain most of their oil needs via the Drujba pipeline, according to Agerpres.

These supplies were repeatedly interrupted over the past week after Ukraine attacked the Unecha pumping station, part of the Drujba pipeline.

Slovak Economy Minister Denisa Sakova announced the resumption of supplies via the Drujba pipeline in a Facebook post. “I hope these operations will remain stable and there will be no further attacks on energy infrastructure,” Sakova wrote.

Separately, Hungarian oil group MOL, which operates refineries in Hungary and Slovakia, said Russian crude had arrived in both countries, but gave no further details.

On Wednesday, Hungarian Foreign Minister Peter Szijjarto said supplies could resume later on Thursday, but volumes would be lower than normal.

Refineries in Hungary and Slovakia have coped with the disruption by drawing on their own reserves without having to shut down operations. A longer disruption would have required tapping state reserves and ultimately led to higher imports through an alternative pipeline from Croatia.

Hungary and Slovakia have been granted an exemption from the European Union (EU) embargo on Russian crude imports because they are landlocked and rely heavily on Russian oil through the Drujba pipeline. Hungary imports 65% of its oil needs and 85% of the gas it consumes from Russia.