Talk with blockpost group

 is a storyline mission appearing in the S.T.A.L.K.E.R.: Lost Alpha mod and will only be given if the player has joined Duty.

"Voronin here. The negotiations failed? Did he bring the discs with him? Wait, he had only one? Damn it, there are two! Both discs contained important information about our bases, stashes and tactical plans. They can't stay in the hands of Sin, we need to strike back and quick! Talk to my agent, I'll mark him on your map."

- Voronin

Overview

 * As the Meet with Negotiator mission concludes, Voronin contacts the player via PDA and tasks him with meeting Warrant Officer up the road.
 * The mission concludes by speaking to him and spawns the Clear Sins base with the Duty group. task.