THREE employees working for the Spanish branch of Medecins Sans Frontieres (MSF) were killed by unknown assailants in Ethiopia's Tigray region, the medical charity has announced. MSF-Spain lost contact with a vehicle carrying the team on Thursday afternoon, it said in a statement. "This morning the vehicle was found empty and a few metres away, their lifeless bodies." "We condemn this attack on our colleagues in the strongest possible terms and will be relentless in understanding what happened," the statement said. It identified the victims as emergency coordinator Maria Hernandez, 35, from Madrid, assistant coordinator Yohannes Halefom Reda, 31, from…