According to latest figures, Afghan security forces have been dying at five times the rate of NATO soldiers, as Taliban insurgents stepped up the attacks ahead of the withdrawal of foreign troops in 2014.
Government figures showed that compared to 165 NATO troops, 853 Afghan soldiers and police were killed in the past four months.
President Hamid Karzai had already warned in May that the Afghan death toll would rise, as the US-led troops would start withdrawing.
ISAF and Afghanistan's interior ministry have noted a surge of 11 percent in attacks in recent months.
Interior Ministry spokesman Sediq Seddiqi said that there had been a surge in casualties suffered by police in the past four months with 635 killed and 1,246 wounded.
He said that 1,730 insurgents had also been killed over the same period.