The NATO security forces suffered the lowest number of casualties in Afghanistan in 2013, as compared to the past six years, while the Afghan security forces have seen casualties increase this year as they took on greater operational responsibilities around the country.
At least 151 NATO forces were killed in 2013, with a total of 394 foreign soldiers killed in 2012.
At least 2,767 Afghan National Army were killed in 2013, which shows an increase as compared to last year when 1,870 Afghan national security forces were killed.
Officials from the Ministry of Defence (MoD) said the cause of the upswing in Afghan casualties was the leading of security operations around the country, which in previous years was not the case.
"We should evaluate casualties among national army personnel from two perspectives: our casualties have reduced over the past two months as compare to the previous year," said Zahir Azimi, a Spokesman for MoD on Wednesday.
"But when we evaluate this through out the year, casualties are a little higher. Previously, casualties were divided among Afghan and coalition forces because they were jointly conducting the military operations, but we handle these things on our own now."
Sediq Sediqqi, spokesman for the Ministry of Interior (MoI), said that police casualties were lowest in the past four months.
"Casualties among Afghanistan's National Police reduced by 80 percent in the past four months, sometimes we didn't even have a single casualty for weeks and these show our efforts, particularly regarding accountability among the police and rapid action to enemy attacks and intimidation," Sediqqi said.
Civilian casualties saw a 10 percent spike as compared to last year.According to a United Nations report, at least 2,730 civilians were killed and 5,169 others were wounded through the end of November in 2013.
NATO combat operations are due to end by December 2014.
According to NATO and Afghan officials, the Afghan security forces have assumed the bulk of leadership on operations throughout the country already.