DUTCH charity ZOA said one of its employees had been killed at a refugee camp in the northern Tigray region of Ethiopia where the military has been fighting rebel forces. The charity said in a statement that the 52-year-old worker was killed in Hitsats refugee camp. He had worked for the charity for 10 years and leaves a wife and seven children. It did not name him or give any details of the killing. "We confirm with great sadness that our colleague was murdered during the recent conflict while on duty for ZOA," Edwin Visser, ZOA's Chief Programme Officer, said…