Mercenaries Relentlessly Attack Me in Stalker Anomaly GAMMA Mod

I was exploring the Zone in Stalker Anomaly GAMMA Mod when I stumbled upon a group of mercenaries. They immediately attacked me, and I found myself surrounded. I tried to fight back, but they were too powerful. I was eventually forced to retreat, but they continued to pursue me. I managed to escape, but I was left shaken by the experience.