The world’s three biggest oilfield service providers are halting future work in Russia, in response to President Vladimir Putin’s invasion of Ukraine. Baker Hughes, Schlumberger and Halliburton announced their decisions separately, within 24 hours of each other.

Thus, Baker Hughes Co. on Saturday said it’s suspending new investments in Russia operations but continuing with existing work there, according to a statement. That followed a similar statement by Schlumberger late Friday, when the world’s biggest oilfield contractor immediately cut any new investment in one of the biggest oil-producing nations while leaving existing work there intact.

“The crisis in Ukraine is of grave concern and we strongly support a diplomatic solution. We condemn violence and our hearts go out to the people and families of those impacted,” Baker Hughes Chief Executive Officer Lorenzo Simonelli said in the statement, according to Bloomberg.

Halliburton Co., the world’s top provider of fracking services, is the only oilfield contractor to halt current and future work in Russia, a country whose oil sector relies on foreign technology, gear and expertise to sustain domestic output of the Kremlin’s key sources of revenue. Halliburton followed some of the largest oil explorers, including BP Plc and Shell Plc, in announcing plans to abandon Russia.

Baker Hughes, which generates as much as 5% in total sales from Russia, received approval from its board of directors earlier in the week, according to a person familiar who asked not to be identified. The Houston-based company has been operating under a halting-new-investments model for the past few days, said the person, who was not authorized to speak about the matter publicly.

A representative for Baker Hughes declined to comment.

Another oilfield services provider, Houston-based Weatherford International Plc, said Sunday that it has suspended all new investments and technology-deployments in Russia and placed a hold on shipments. Weatherford has no joint ventures or partners in Russia, CEO Girish Saligram said in a statement.

Spending on fossil-fuel exploration in the region that includes Russia and the former Soviet Union was already expected to grow at a slower pace than the rest of the world, Evercore ISI said in December.

Schlumberger said earlier this month it will take an earnings hit from the combined effects of Russia’s attack on Ukraine and an increasingly snarled global supply chain. Baker Hughes has the second-highest exposure to Russia, after Schlumberger, analysts say.

Halliburton generates about 2% of its sales from Russia, according to JPMorgan Chase & Co.