Human rights activists called the Russian invasion of Ukraine aggression.

The Prosecutor of the International Criminal Court has launched an investigation into possible war crimes, crimes against humanity or genocide in Ukraine.

Prosecutor Karim Khan said he launched an investigation after 39 Member States made such a request.

“A few minutes ago, I notified the ICC Presidium of my decision to immediately begin an active investigation,” Khan said. “Our work on collecting evidence has begun.”

Khan said the investigation will look at offenses committed since November 2013, “thus covering any past and current allegations of war crimes, crimes against humanity and genocide in any part of the territory of Ukraine and by any person.”

The human rights organization Amnesty International called the Russian invasion of Ukraine a “crime of aggression” in accordance with international law.

“Attacks on protected facilities, such as hospitals and schools, the use of indiscriminate weapons, such as ballistic missiles, as well as the use of prohibited weapons, such as cluster bombs, can qualify as war crimes,” human rights activists said.

The U.S. President Joe Biden also pointed to Russian violations in Ukraine.

“Russia is responsible for the devastating human rights violations and the international humanitarian crisis in Ukraine, which we are watching in real time,” Biden said.

Republican Senator Lindsey Graham called on the court to investigate Russia’s actions.

In an interview with a journalist of the Business Insider portal, Graham, who in 2015 threatened to stop helping the Palestinians if they filed a lawsuit against Israel with the ICC, said that applying to this body is justified when it comes to investigating crimes in Ukraine.

“There is no point in going to this court when it comes to America or Israel.” he said. “But this is absolutely logical when it comes to places where there is no rule of law.”

Former U.S. President Bill Clinton signed a treaty establishing the ICC in 2000, but it was never ratified by the Senate. His successor, George W. Bush, officially withdrew from the agreement.

Neither Russia nor Ukraine are members of the ICC.