Russia's largest gas producer Gazprom announced Friday that it had stopped its supply of gas via the Nord Stream 1 pipeline for an indefinite period due to malfunctions at a compressor unit. 

The announcement came hours after the Group of Seven countries agreed to impose a price cap on Russian oil in an attempt to stem the flow of funds into the Kremlin's war coffers.

An oil leak was detected during joint maintenance work with Siemens, a German technology giant, at the only remaining Trent 60 gas compressor unit of the Portovaya compressor station, Gazprom said in a Telegram post.

According to Gazprom, it had received a warning from Russia's state technology and ecology watchdog Rostekhnadzor concerning the fact that the detected malfunctions "do not allow for the safe trouble-free operation of the gas turbine engine."