The European Union is negotiating a ban on Russian liquefied natural gas exports in its latest sanctions package, bolstering U.S. actions to restrict Russia’s fossil fuel revenue, slow construction of new LNG terminals, and upend its ability to export the chilled gas to buyers overseas.

The crackdown on Russian LNG comes as Western leaders search for a way to restrict more aggressively Russia’s energy revenues, which provide funding for its war in Ukraine. In the more than two years since Russia’s invasion, the West has passed dozens of sanctions packages and bans on Russian oil and gas, including a G7 effort to cap prices for Russian crude oil.