A US mercenary fighting on the frontlines against the Russian armed forces said the Bakhmut frontlines were highly gruesome, comparing it to a meat grinder, as Russia pushes against Kiev's forces in the city for which battles have been taking place for months.

Former US Marine Troy Offenbecker underlined to ABC News that the life expectancy of Ukrainian soldiers on the city's frontlines was only about four hours, with a major offensive still expected from Russia.

"It's been pretty bad on the ground," he told the US network. "A lot of casualties. The life expectancy is around four hours on the frontline."

Offenbecker underlined that he was not sure how long Kiev's forces would be able to hold the city, adding that the expected offensive had already kicked off and that attacks from Russians have been "nonstop" in Bakhmut, with artillery raining down upon it "all day and night".

Meanwhile, a retired US Marine Corps Colonel told Newsweek that the ongoing battles in Bakhmut were highly reminiscent of World War I, highlighting that during WWI, "the line didn't move very much but there was tremendous attrition."

He further underlined that experts thought Russia's push would "explode", where one day everything would be quiet, with the next day witnessing a "huge attack". 

Ukrainian Deputy Prime Minister Irna Vereshchuk urged last week all residents of Bakhmut to evacuate from the city immediately. "I appeal to the civilians who are still in Bakhmut. If you are adequate, law-abiding, and patriotic citizens, you must evacuate immediately," she wrote on Telegram. 

The official declared that up to 6,000 people were still present in the city that was taken over by Russian forces, adding that staying could "expose them to danger...second, you are creating additional problems and risks for all those people who are trying to help you (the military, the national police, volunteers). Third, you prevent our defense and security forces from working normally in the city. Because they have to be concerned about your safety all the time. Therefore, I once again urge you to evacuate immediately."

Russian forces gained ground in the northern part of the strategic city of Bakhmut and blocked three out of four routes supplying Ukrainian troops since early February.

Days earlier, White House National Security Council spokesperson John Kirby warned that the city of Bakhmut may fall to Wagner forces, but it will not have a strategic bearing on the war as a whole.

Kirby acknowledged the recent advances made by Wagner in Bakhmut but noted that it was still uncertain whether the city would fall. 

The remarks on the status of Bakhmut came as he responded to a question about the US encouraging Ukraine to redirect their efforts and resources elsewhere rather than exhausting them on a losing battle. 

Western media have been speaking about the Battle of Bakhmut for over a month now, in which Kiev's allies fear that Russian control over it will be key to the collapse of the entire front in the hands of the Russian forces during the harsh winter, while Russian sources confirm that the Ukrainian forces and mercenaries are suffering heavy losses in lives and equipment.