The European Commission does not expect the Nord Stream 1 pipeline to restart after its annual 10-day maintenance, which is scheduled to conclude on Thursday, the Wall Street Journal reported, quoting European Budget Commissioner Johannes Hahn.

"We're working on the assumption that it doesn't return to operation," Hahn told reporters in Singapore, according to the Journal.

Russian gas deliveries through the Nord Stream pipeline, the country's main export route to Europe, will be temporarily halted until July 21 for scheduled annual maintenance which began July 11, according to TASS.