The United Nations Office for the Coordination of Humanitarian Affairs (OCHA) warns that the security situation in eastern South Kivu, Democratic Republic of the Congo, has sharply worsened since early December following an escalation of armed clashes in Uvira, Walungu, Mwenga, Shabunda, Kabare, Fizi, and Kalehe territories. The number of people affected by the fighting has risen significantly, with preliminary reports indicating that more than half a million people have been displaced.