The U.N. human rights chief says all parties in Libya have committed numerous grave human rights abuses ranging from deadly attacks on civilians to executions, abductions and torture.

Zeid Raad al-Hussein said in a report to the U.N. General Assembly circulated Tuesday that Libya is facing the worst political crisis and escalation of violence since longtime dictator Moammar Gadhafi was overthrown in 2011, which has had a devastating effect on human rights.

He said the country is now split between two governments which both claim legitimacy, "while powerful armed groups exercise effective control on the ground, committing violations of international human rights and humanitarian law with impunity."

Zeid said the justice system continues to be attacked and isn't functioning in parts of the country.