At least 12 Afghan National Army (ANA) soldiers were killed overnight while asleep at an outpost near Kunduz city, in what is believed to have been an insider attack, officials said on Tuesday.
According to a source two soldiers managed to escape the attack.
The Ministry of Defense (MoD) deputy spokesman Mohammad Radmanish confirmed the incident and said a team has been appointed to investigate the incident.
Reuters meanwhile reported that Sher Aziz Kamawal, a senior police commander in Kunduz, said two soldiers with suspected links to the Taliban fled and joined the insurgents after carrying out the attack overnight.
The outpost was among many forming a protective ring around Kunduz city, which briefly fell to the Taliban late last year.
Insider attacks have plagued both Afghan and international military forces in the country over the past few years.