More than 6,400 people have been killed in Ukraine, and millions more are suffering from hardship, the United Nations said Monday. The U.N. human rights office (OHCHR) also noted in its latest report that an overall decrease in indiscriminate shelling since a fragile truce was agreed in Minsk in February had resulted in less civilian casualties. Still, at least 6,417 people have been killed since the start of the conflict in April 2014, including at least 626 women and girls. Another 15,962 have been wounded. "This is a conservative estimate and the actual numbers could be considerably higher," the OHCHR said in a statement. Meanwhile, the report said, roughly five million others are suffering the consequences of the conflict, including 1.2 million people who have been displaced inside the country. "Even with the decrease in hostilities, civilians continue to be killed and wounded," U.N. High Commissioner for Human Rights Zeid Ra'ad Al Hussein said in the statement. "We have documented alarming reports of summary executions by armed groups and are looking into similar allegations against Ukrainian armed forces."