The UN Office of the High Commissioner for Human Rights (OHCHR) Monday reported 6,469 civilian casualties in Ukraine since Russian forces invaded in February. The figure includes 3,153 civilian killed and 3,316 injured.

The OHCHR has monitored the situation in Ukraine closely and provides regular civilian casualty updates. The OHCHR reports statistics gathered by the UN Human Rights Monitoring Mission in Ukraine (HRMMU) through interviews, official records, photo and video materials, court documents, medical data and other sources. All sources are assessed for their relevance and credibility.

Monday’s OHCHR report spans February 24 through midnight on May 1. The 3,153 people killed include 1,115 were men, 722 women, 71 girls and 83 boys. An additional 72 children and 1,090 adults whose sex is still unknown have also been killed. Of the 3,316 injured, 395 were men, 324 women, 69 girls and 80 boys with another 170 children and 2,278 adults whose sex is still unknown.

According to the OHCHR, most of the reported casualties were caused by the use of explosive weapons with wide impact areas, such as multiple launch rocket systems and missile and air strikes. Additionally, the OHCHR noted that the actual casualty figures are likely considerably higher. It has been difficult for human rights monitors to obtain information from areas of ongoing hostilities. The OHCHR cited areas of concern including Mariupol, Izium (Kharkiv region) and Popasna (Luhansk region).