 The United Kingdom has warned its citizens of a possible outbreak of violence in Nigeria as the country celebrates its democracy day on Saturday. It gave the warning in its latest travel advisory published on its website on Friday. It said the Niger police force launched Operation Restore Peace on May 19 to deal with the recent increase in insecurity in the South-South and South-Eastern part of the country. The travel advisory further explained that in southern Nigeria, curfews were imposed in response to reports of attacks on security personnel, police stations and checkpoints.