BERLIN — The German government, increasing the economic pressure on Russia over its involvement in Ukraine, has blocked delivery of parts for a high-tech military training center that was to be completed in Russia by the end of the year, a spokeswoman for the Economics Ministry said Monday.

Sigmar Gabriel, the economics minister, withdrew the right of Rheinmetall, one of Germany’s leading military equipment contractors, to deliver the final parts of a field-exercise simulator to Russia that was scheduled to be operational in the fall. The move goes a step beyond sanctions adopted by European Union members last week, which did not apply to existing contracts.

“You can see from our decision that the German government follows a very clear course that we, of course, consider to be right,” said Tanja Alemany, a spokeswoman for the Economics Ministry. She refused to comment on whether Germany was tacitly criticizing other European Union countries, in particular France, which has drawn fire for its plans to deliver a Mistral-class helicopter carrier to Russia.

A spokesman for Chancellor Angela Merkel said that Berlin would be open to expanding the existing European Union sanctions to include already signed deals. “The European Council decided what it decided,” the spokesman, Georg Streiter, told reporters on Monday.