At least 230 Sudanese villagers killed in tribal attacks over disputed land

Minister says more than 30,000 people forced to flee in Blue Nile state as tensions between rival communities erupt into violence

At least 230 people have been killed and more than 200 injured in attacks on villages in Sudan's Blue Nile state over the past few days, according to authorities.

Gamal Nasser al-Sayed, the health minister in the southern state, which borders Ethiopia and South Sudan, told the Guardian that more than 30,000 people in eight villages in the Wad al-Mahi area had had to flee as their homes were torched and villagers were attacked.