PGNiG said in a statement that it was monitoring the situation and is prepared to obtain gas from other connections thanks to a "government strategy of diversifying" sources.
[...]
Bulgargaz said in a statement that it "fully met its obligations and has made all payments required under its current contract in a timely manner, strictly and in accordance with its terms."

Gazprom did not immediately confirm the cut-offs. However, Russian news agency Tass

According to the European Network of Transmission System Operators for Gas (ENTSOG), the physical flow of Russian gas through the Kondratki station stopped on the night of April 26. At the same time, a similar situation was observed on the night of April 24.

According to the Polish gas pipeline network operator Gaz-System, the flow of Russian gas through the Yamal-Europe gas pipeline on the border of Belarus and Poland through the Kondratki gas measuring station as of April 25 fell by 75% compared to April 21.

quoted a Gazprom executive saying that Poland must pay for its gas supplies under a "new payment procedure."