"Russia, in flagrant disregard of international humanitarian law and in deliberate war crimes, is employing tactics of repeated air and missile strikes against civilians in Ukraine, similar to those previously tested in Syria," said Timothy Hanway, the Charge d'Affaires of the U.S. Mission to the OSCE.

"I must underscore the credible reports that the Russian military is conducting successive strikes in Ukraine against civilians, including medics and those providing aid to victims of initial strikes. The Russian government is repeating its actions in Syria, where numerous airstrikes have resulted in civilian casualties, including emergency responders and humanitarian workers," the American diplomat said.

Hanway highlighted a specific incident, the March 1, 2022 "Kalibr" strike on Svobody Square in front of the Kharkiv regional state administration.

"Five to seven minutes after the rescuers arrived, a second strike with a similar missile targeted the building. This suggests a deliberate targeting of rescuers and those injured in the first attack," Hanway said.

He noted that additional evidence of such Russian attacks has since emerged. Using these tactics, the occupiers have caused the deaths of over 90 medical workers, police and firefighters, and injured nearly 350 civilians across Ukraine, according to Hanway's report.