At Kalma, the largest camp of displaced people in the area with a population pushing 100,000, local police officers are not allowed inside. After violent clashes broke out last year between camp dwellers and local government officials, the police moved their substation out of the camp to a patch of sand nearby. Resources are thinner for the Sudanese police force. Even those officers committed to policing frequently find it hard to do their jobs. Some police posts lack vehicles, while victims must sometimes provide their own pen and paper to fill out a report.