A U.S. citizen has been killed in Ukraine, a top U.S. official has confirmed. “I can confirm that an American citizen was killed. I don’t have any more details for you than that,” U.S. Secretary of State Antony Blinken told reporters during a March 17 briefing in Washington. “We offer our sincerest condolences to the family on their loss,” a State Department spokesperson told media outlets. “Out of respect to the family during this difficult time, we have no further comment.” Authorities in Chernihiv, Ukraine, said earlier on March 17 on social media that a U.S. citizen was among the casualties from Russian artillery attacks “on unarmed civilians.” Cheryl Hill Gordon, a New Mexico resident, posted on Facebook around the same time that her brother, Jimmy Hill, had been killed in Chernihiv. “He was waiting in a bread line with several other people when they were gunned down by Russian …