At least 43 soldiers were killed after the Taliban carried out two suicide car bombings at an army camp in the southern Kandahar province, the Afghan officials said.
A member of parliament from the province, Khalid Pashtun provided the toll of the attack.
An Afghan security official, speaking on condition of anonymity because he was not authorised to release the information, confirmed the toll.
In a media statement, the Taliban claimed responsibility of the attack. Afghan forces have struggled to combat a resurgent Taliban since the US and NATO forces formally concluded their combat mission at the end of 2014.
Elsewhere in Afghanistan, a Taliban ambush in the northern Balkh province late Wednesday killed six police, according to Shir Jan Durani, spokesman for the provincial police chief.
(With PTI inputs)
ALSO READ | Afghanistan: 3 killed, 16 wounded in Cinema Pamir attack, says Kabul Interior ministry