At the very least, two of our guys have gone missing after leaving their base in Kabul on Friday.
"Two International Security Assistance Force service members departed their compound in Kabul City in a vehicle on Friday afternoon and did not return," ISAF said in a brief statement.
"The unit dispatched vehicles and rotary-winged assets to search for them and their vehicle, and the search is ongoing."
A Taliban spokesman told Reuters that insurgent commanders had reported the pair was being held and that a third servicemen had been killed. The ISAF statement did not mention a third service member.
Local radio in Logar, a short but dangerous drive to the south, broadcast appeals from ISAF commanders for information about the two and offering a $20,000 reward.
One other serviceman - National Guardsman Bowe Bergdah - was captured last year but it is not clear whether he was a deserter or a POW. Bergdah has made several videos denouncing the war.
The apparent capture of US military personnel comes on the heels of a roadside bomb attack yesterday that killed 5 Americans. It is evident that things are starting to heat up in Afghanistan as the increased number of troops carry out operations aimed at regaining control of territory from the Taliban.