German Chancellor Olaf Scholz was cautiously optimistic on Wednesday that security in Europe would be maintained, despite uncertainty over Russia's intentions in Ukraine.

Scholz said "much has happened" in reference to a recent flurry of diplomacy that he suggested marked "progress" in the efforts to avoid conflict.

"The task is that we ensure the security in Europe, and I believe that that will be achieved," he said during a joint press conference with Danish Prime Minister Mette Frederiksen.

Nevertheless, the German chancellor said he was aware that there is still a long way to go in negotiations.

"It is too early to say the problems are solved. They are so serious and will remain for some time yet, so they deserve our attention," Scholz said.