The Norwegian Ministry of Foreign Affairs announced the news in a press release on Saturday.
This is the first time Norway has intervened in a dispute between two states at the court.
The case concerns Russian accusations that genocide took place against the Russian and Russian-speaking population in eastern Ukraine before the war of aggression began.
Russia’s accusation has been refuted by several researchers, news bureau NTB reports.
“We have a legal interest in contributing to the clarification of the questions raised by the case.
“It is also important to signal to Russia and the outside world that the international community does not accept the aggression against Ukraine,” Foreign Minister Anniken Huitfeldt said.