Bond creation between fibers

Hi
I am currently using LIGGGHTS-flexible fiber version.
My problem is somewhat similar to the shear box tutorial. I first create fiber templete by bonding the spheres; bonds and atoms are of type 1.
After fiber -fill in a space and depositing them onto a plate, I want to bond those fibers whose separation is less than a critical value. I want to create a bond of type 2 for inter-fiber bonds.
Since I have atoms of type 1 through out, how should I ensure that atoms are bonded with bond-1 within a fiber, however, with bond-2 inter-fibers (cross-link).
Please have a look at the attached picture for the illustration

Thanks
Shubham