Gazprom’s daily gas exports to its main markets fell in the first 15 days of this year to the lowest level since 2015 amid criticism that the Russian group is limiting its deliveries to Europe, according to Bloomberg.

The Russian-controlled group said Monday that it had exported 5.4 billion cubic meters to its main markets in the first 15 days of the new year, which include most of Europe, Turkey and China. This amount is equivalent to an average of 360 million cubic meters per day and is almost 18% lower than last month’s average.

At the same time, Gazprom’s gas production in the first half of January reached 23.1 billion cubic meters, or 1.54 billion cubic meters per day, the highest level since 2014, according to Bloomberg calculations.

Russia’s gas supplies to Europe are being closely monitored as fuel shortages and rising prices affect the continent’s economies. European Competition Commissioner Margrethe Vestager said last week that she was looking forward to answers from Gazprom on limited deliveries. Earlier, the director of the International Energy Agency, Fatih Birol, blamed Russia for the energy crisis in Europe, according to Agerpres.

“Neither Russia nor our main exporter Gazprom has anything to do with it,” Russian Deputy Prime Minister Alexander Novak said on Saturday. According to him, Russia has delivered a significantly higher amount of natural gas to customers such as Germany and Turkey, countries that have exhausted their contracted volumes.

Russia’s Gazprom Group said on Monday it was “delivering natural gas in line with customer requests and in accordance with contractual obligations”. Gazprom did not provide detailed figures on exports to each country, making it difficult to assess deliveries to the EU- Russia’s largest buyer of natural gas, but said deliveries to Bulgaria, Turkey and China had risen from a similar period last year.

For more than three weeks, the Yamal-Europe pipeline has been sending reverse gas from Germany to Poland, and deliveries of Russian gas to a key pipeline to Slovakia via Ukraine are about a third of normal.

In late December, Russian President Vladimir Putin said Gazprom was complying with long-term gas supply agreements, adding that the lack of deliveries through the Yamal-Europe pipeline was a consequence of a lack of demand from European customers.