UN investigators have uncovered new evidence of mass graves thought to contain the bodies of migrants at a trafficking point in north-west Libya.

The organisation’s fact-finding mssion said the discovery - in the town of Tarhuna - provided further evidence that human rights violations in Libya are “widespread, systematic or both.”

The findings have been presented to the Human Rights Council.

Libya – a major hub for migrants trying to reach Europe - has been experiencing ongoing violence and instability since the toppling and killing of the country’s long-time leader Muammar Gaddafi more than a decade ago.