A PNP camp in Aguid, Sagada was attacked by a group believed to be belonging to the NPA.

Two policemen were killed and two of their colleagues were wounded when New People’s Army (NPA) rebels, marking their 45th anniversary, swooped down on the camp of the Regional Public Safety Battalion in Sagada, Mt. Province Saturday.

Senior Superintendent Oliver Enmodias, Mt. Province police director, withheld the identities of the slain and wounded soldiers as their relatives still have to be informed about the incident. [source]

The presence of the military batallion and the subesquent attack of the alleged NPA members can be seen as a violation of the peace zone status of Sagada.

Update

Another source mentions that it was the government troops (or police as they being called) that overran two rebel camps, but resulted in military casualties. The the clash that resulted in the deaths and wounding happened in Dalican, Bontoc and not in Aguid, Sagada.

Two rebel camps of New Peoples Army rebels were reportedly overran by policemen aided by the military Saturday, when the NPA was celebrating its founding anniversary celebration.

However, fleeing rebels and reportedly some supporters were able to fire back and killed Police Officers 1 Jefferson Sari and Marcelo Kilasen while Police Officers 1 Romeo Fakat Jr., and Benido Magan were wounded and brought to the Bontoc General Hospital for treatment.

The policemen were met with gunfire at Bandong Hill, barangay Dalican, Bontoc, Mt. Province’s capital town. [source]