Military officials said on Sunday that an Afghan soldier fired on NATO troops, wounding a Polish soldier, and then fled.

CNN has reported that the injured soldier remained hospitalized after the Saturday attack in the eastern province of Ghazni and international forces and Afghan troops were searching for the shooter.

The country's defense ministry said that the Afghan National Army soldier opened fire during an argument.

With the Taliban claiming responsibility and saying its members have infiltrated Afghan forces, attacks on NATO troops by Afghan soldiers have been on the rise.

According to reports, a U. S. soldier was killed by an Afghan soldier in a December shooting that also injured two Italians at a shared base. And in November, an Afghan police officer fatally shot five British soldiers in the southern province of Helmand. (With Inputs from Agencies)