"If there were still any doubts about whether there may be any trust in deliveries from Russia, current events clearly show us that there is no more trust," said Uldis Bariss, CEO of Conexus Baltic Grid.
"Since April 1st Russian natural gas is no longer flowing to Latvia, Estonia and Lithuania," he told Latvian Radio.
He added that the Baltic market was currently being served by gas reserves stored underground in Latvia with around 7.6 terawatt hours in reserve – almost as much as Latvia consumes in a typical winter.
The move comes as Russian President Vladimir Putin has sought to leverage Russia's status as a supplier of energy to earn revenues to finance his illegal war in Ukraine.
With his economy crippled by unprecedented international sanctions, Putin warned EU members that they would need to set up ruble accounts to pay for Russian gas.
He said Thursday that existing contracts would be halted if the payments were not made.
While the United States banned the import of Russian oil and gas, the European Union – which received around 40 percent of its gas supplies from Russia in 2021 – has retained deliveries from Moscow.
Lithuanian President Gitanas Nauseda called on the rest of the EU to follow the Baltic example and take a stand.
"From this month on - no more Russian gas in Lithuania," he said on Twitter.
"Years ago my country made decisions that today allow us with no pain to break energy ties with the aggressor," he added. "If we can do it, the rest of Europe can do it too!"
From this month on - no more Russian gas in Lithuania 🇱🇹.— Gitanas Nausėda (@GitanasNauseda) April 2, 2022
Years ago my country made decisions that today allow us with no pain to break energy ties with the agressor.
If we can do it, the rest of Europe 🇪🇺 can do it too!
Lithuania's Prime Minister followed up with a tweet on Sunday morning.
From now and so on Lithuania won't be consuming a cubic cm of toxic russian gas.— Ingrida Šimonytė (@IngridaSimonyte) April 3, 2022
LT is the first EU country to refuse Russian gas import.