Hundreds of Egypt's ethnic minority Nubians have blocked a main road in the country's south to protest the government's plan to sell land they claim to be their ancestral territory.

Monday's protest, on the road between the city of Aswan and the Abu Simbel archaeological site, came after police last weekend prevented a group of Nubians from returning to their land.

Nubians have been forcibly displaced four times in the 20th century, most recently in 1964 with the construction of the Aswan High dam.

Egypt's new constitution, adopted in 2014, grants Nubians the right to return to their land within 10 years of ratification.

However, Egypt's President Abdel-Fattah el-Sissi has designated large swaths of land that was once Nubian for a new development project and transformed others into military zones.