Joe Biden announced on Tuesday night that the US is banning Russian aircraft from its airspace and pledged to go after Russian oligarchs in retaliation for the invasion of Ukraine.

Biden said the moves would further isolate Vladimir Putin. “The Ruble has lost 30% of its value,” he said. “The Russian stock market has lost 40% of its value and trading remains suspended. Russia’s economy is reeling and Putin alone is to blame.”

Biden said the US Department of Justice was assembling a dedicated taskforce to go after “the crimes of Russian oligarchs. We are joining with our European allies to find and seize their yachts, their luxury apartments, their private jets. We are coming for their ill-begotten gains,” he said.

The announcements are the latest in a series of sanctions against Russia and follows similar actions by Canada and the European Union this week.

Biden offered an ominous warning that without consequences, Putin’s aggression wouldn’t be contained to Ukraine.

“Throughout our history we’ve learned this lesson: when dictators do not pay a price for their aggression, they cause more chaos,” Biden said. “They keep moving. And, the costs and threats to America and the world keep rising.”

On Sunday, the EU and Canada announced they were closing their airspace to Russian airlines and private planes owned by wealthy Russians.

Russia’s largest airline, Aeroflot, on Monday said that it had suspended flights to New York, Washington, Miami and Los Angeles through Wednesday because of Canada’s decision.

No US airlines fly to Russia, though a few flights to India pass through Russian airspace. American Airlines routes its lone flight between Delhi and New York to avoid Russian airspace. FedEx and UPS both fly over Russia, although they announced this weekend that they were suspending deliveries to that country.

European airlines fly over Russia far more often than their US counterparts. Before the war, about 600 flights to or from Europe passed through Russian airspace, according to aviation data firm Cirium.

Aviation experts say Russia derives a sizable amount of money from fees that it levies to use its airspace or land at its airports.

The ban would come on top of a wide range of sanctions the US, Europe and other countries have imposed on Russia that are expected to hammer its economy including cutting off Russian banks from the Swift international banking system, preventing the Russian central bank from deploying its international reserves, and freezing the assets of people close to Putin.

Wires contributed to this report