600 human rights organizations have called on the United Nations Human Rights Council to initiate an investigation into "police violence and crackdowns on protests" in the United States.

Among the signatories of the joint speech - which calls for a special session of the Council - are the American Civil Liberties Union, the International Federation for Human Rights, and the World Organization Against Torture.

The Geneva-based Human Rights Council, which is scheduled to start its meetings on June 15, can hold a special session if a third of the members ask it to. The United States withdrew from the council two years ago, accusing it of bias against Israel.

The letter has the support of a defenseless, African-American brother and son of George Floyd who died at the hands of the Minneapolis City Police on May 25 after a policeman perched with his knee on his neck for about nine minutes.

The letter stated that the death of Floyd, 46, was "one of a series of recent unlawful killings of lions isolated by the police and white gunmen."

He also says, "We are very concerned that the violent response of the police to the peaceful protests has escalated dramatically in the United States, which has included rubber bullets, tear gas and pepper spray, and in some cases live bullets, in violation of international standards for the use of force and crowd management."

The organizations also expressed concern that President Donald Trump "instead of using his position as a force to sow calm and unity, chose to use tension as a weapon through his statements."

The organizations' joint speech returned to say that the Human Rights Council should launch an independent investigation into "racist police activities in cities across the country that appear to be continuing with impunity" since the killing of an African-American teenager Michael Brown in Ferguson, Missouri in 2014, and accusations of the use of force Excessive against peaceful protests and journalists since Floyd's death.