“We have been in touch with the family and have provided all possible consular assistance. Out of respect to the family during this difficult time, we have nothing further,” the spokesperson said.
He was 52 years old and is survived by his wife and five stepchildren, the obit said.
US citizens Alexander John-Robert Drueke, 39, from Tuscaloosa, Alabama, and Andy Tai Ngoc Huynh, 27, from Hartselle, Alabama, had been fighting alongside Ukrainian forces north of Kharkiv.
The last time his wife and close friends had heard from Kurpasi was in April. He chose to volunteer alongside Ukrainians in Ukraine but initially did not envision himself fighting on the front lines, a family friend told CNN.
The US has urged Americans not to travel to Ukraine at this time due to the active armed conflict and the “singling out of US citizens in Ukraine” by the Russian government.
This story has been updated with additional background information.