This overview document presents the available information on incidents where aid workers were reportedly killed, injured or kidnapped (KIK incidents) between January and March 2018. The report is based on incidents identified by Insecurity Insight's monitoring of open sources and reported by Aid in Danger partner agencies using the Security in Numbers Database (SiND). The available open-source and confidentially shared information is an indication of the number of aid workers killed, injured or kidnapped. However, no claim is made that the total number of aid workers affected has been documented or is known. Total KIK figures and quick charts for January to March 2018 are available on Humanitarian Data Exchange Insecurity Insight. Data collection is ongoing and data may change as more information is made available.