The document was submitted to the upper house by Republican Senator Lindsey Graham.

The U.S. Senate has unanimously adopted a resolution calling for an investigation into alleged war crimes committed by the Russian government and its President Vladimir Putin himself.

The document, which was submitted to the upper house by Republican Senator Lindsey Graham, contains a strong condemnation of “violence, war crimes and crimes against humanity,” which are allegedly committed by the Russian armed forces in Ukraine under Putin’s leadership.

The resolution calls on the International Criminal Court to investigate the activities of Putin, members of his Security Council, as well as the command of the Russian armed forces for committing war crimes.

“These atrocities should be investigated for war crimes,” said Chuck Schumer, the leader of the Democratic majority in the Senate, speaking about the actions of the Russian military in Ukraine.

The resolution does not have the force of law, but reflects the general mood of legislators.

Earlier this month, the prosecutor of the International Criminal Court 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.

The U.S. Vice President Kamala Harris also expressed support for calls for an international investigation of Russia’s alleged war crimes on the territory of Ukraine.

This call was made after reports of the Russian bombing of a maternity hospital in the city of Mariupol.

“Of course there should be an investigation, and we all need to monitor what is happening,” Harris said during a visit to Warsaw.

“It is absolutely obvious to us that the Russians are committing war crimes in Ukraine,” she added.

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.