Boeing and Ford suspend operations in Russia.

Boeing and Ford Motor suspended their business activities in Russia because of the war in Ukraine.

Boeing said on Tuesday that it had stopped major operations in its Moscow office. The company stopped providing parts, maintenance and technical support to Russian airlines. In recent days, countries around the world have imposed sanctions on Russian carriers, limiting their ability to use leased planes, fly over Western Europe, or buy spare parts.

A major design center in Moscow is one of the things that Boeing has in Russia. The company runs a flight training campus and research and technology center in the city, as well as a joint venture in Russia with Boeing's largest titanium supplier.

Boeing said it had enough titanium on hand to keep making commercial aircraft in the near term, as it has been trying to diversify its titanium supply in recent years.

Ford is suspending its operations in Russia indefinitely because of the invasion. More than 600 miles east of Moscow, the automaker is part of a joint venture that makes small delivery vans. It works with a distributor that sells imported Ford vehicles.

The company said in a statement that it was concerned about the invasion of Ukraine and the threats to peace and stability.

Ford shut down three plants in Russia in order to turn around its European operation.