The US Senate unanimously approved a resolution late Tuesday seeking investigations of Russia’s President Vladimir Putin and his regime for possible war crimes over the invasion of Ukraine, AP reported.

The bipartisan measure from Sen. Lindsey Graham, R-S.C., says the Senate strongly condemns the “violence, war crimes. crimes against humanity” being carried out Russian military forces under Putin’s direction. It encourages international criminal courts to investigate Putin, his security council and military leaders for possible war crimes.

“These atrocities deserve to be investigated for war crimes,” said Senate Majority Leader Chuck Schumer, D-N.Y.

The measure was approved swiftly and without dissent as lawmakers in Congress continue to muscle a bipartisan show of force against the Russian war in Ukraine.

First introduced almost two weeks ago, the Senate resolution would not carry the force of law, but is another example of Congress providing the Biden administration political support to take a tough line against Putin’s aggression.