A Sudanese engineer checks the damage to a power station in a largely damaged oilfield in Heglig April 23, 2012. Sudanese President Omar al-Bashir vowed on Monday not to negotiate with South Sudan after it occupied the oil-producing Heglig region. Weeks of border fighting have brought the neighbours closer to a full-blown war than at any time since the South split away from Sudan as an independent country in July. [Photo/Xinhua]

A Sudanese engineer walks near a damaged oil tank in a largely damaged oilfield in Heglig April 23, 2012. [Photo/Xinhua]