South Sudan on Thursday accused the Khartoum government in the north of bombing 74 kilometers deep inside its territory, and of sending troops into contested border areas. \"They have flown into our territory 74 kilometers and are violating South Sudanese airspace,\" Information Minister Barnaba Marial Benjamin said of the airstrikes midday Wednesday. Sudanese troops are 17 kilometers inside the South\'s oil-rich Unity state, an area also claimed by Khartoum, according to Juba.