Fire on the Barricades

Talk to Grigory Chilin and Gerard de Desirae in the Surveyors' camp outside the secured perimeter and return to Sarbaz Baybut.

We've been searching the Scientific Quarter, and we have discovered something peculiar. You must have noticed that the perimeter around the Central Laboratory was hastily built in order establish defenses against something. All the Mechanoids, all other defensive systems are concentrated in a circle around the laboratory. This is rather strange, don't you think?
You should listen to what my colleagues have to say.

Talk to my colleagues. They have something to say.

I agree with my colleagues. All lines of defense were built in haste, and they all face the Central Laboratory. No survivors. Mechanoids are set in the attacking mode and uncontrollably assault everyone they see.
Searching for something under such conditions is pretty tough...