BEND, OR -- The Oregon Nurses Association says St. Charles Health System illegally spied on nurses during staff personal time, and the union has filed an unfair labor practice charge.

ONA claims a group of 70 nurses met on their own time to deliver a letter to St. Charles executives. But they were barred from entering the administrative office and they say security was called. Afterwards, the union says managers appeared to take photos and videos of nurses gathered outside.

Negotiations with Bend nurses have been ongoing since the last contract expired in December.