Libyan security authorities have recovered at least 11 more bodies of migrants a mass grave in the southeast of the country, a security official told Reuters on Thursday.

Libya authorities uncovered nearly 50 bodies this week from two mass graves in the country’s southeastern desert, officials said Sunday, in the latest tragedy involving people seeking to reach Europe through the chaos-stricken North African country.

Libyan security forces have uncovered more mass graves in the southeast, bringing the total number of migrant bodies found to 57. The International Organization for Migration reported gunshot wounds on some bodies.

Some of the bodies of migrants found in two mass graves in Libya bore gunshot wounds, the International Organization for Migration said on Monday, adding that one of the sites is thought to contain up to 70 bodies.

Human traffickers have benefited from a decade of instability in Libya, with rights groups documenting widespread abuse.

The bodies of at least 28 migrants have been recovered from a mass grave in a desert in south-east Libya, the country's attorney general said.The grave was discovered north of Kufra, just days after another mass grave with 19 bodies was found on a farm in the same city.

The International Organization for Migration (IOM) has expressed shock and concern at the discovery of two mass graves in Libya containing the bodies of dozens of migrants, some with gunshot wounds. Nineteen bodies were discovered in Jakharrah (around 400 km south of Benghazi),