About 50 to 100 Afghan soldiers are killed in battle every week but the high casualty rate doesn't mean the country's forces are at the breaking point, a US general says.
"The Afghan security forces are suffering more casualties, no question about it," Lieutenant General Mark Milley said by video link from Afghanistan.
Milley, the deputy commander of US forces in Afghanistan, said "somewhere in the range of 50 to 100 or so Afghan security forces are killed in action per week".
"And that's not at all insignificant. That is significant. And we're paying attention to that," he said.
The general said the casualty rate approached losses suffered by American forces in the Vietnam War, a conflict that claimed the lives of about 58,000 US troops.
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NATO's US-led force is working to help Afghan army and police improve their tactics, conduct medical evacuations and counter roadside bombs to "minimise" casualties, Milley said.
As Afghan forces employ more helicopters, artillery and mortars, their casualties are expected to decline, he said.
But Afghan forces were resilient and could withstand the casualties because he said they were determined to prevent Taliban militants from taking back political power, he added.
"They're hard. They're tough. And I don't think the rates of casualties, although significant, I don't think that's going to shatter or break the security force," said Milley, the head of the NATO-led force's joint command.
The top commander of NATO and US forces, General Joseph Dunford, voiced concern at casualties being suffered by Afghan forces in an interview with the Guardian published on Tuesday.
"I'm not assuming that those casualties are sustainable," Dunford told the British daily.
Afghanistan's 350,000-strong security forces are suffering a steep rise in attacks as the NATO mission winds down.
