Drag Bunt down first runner hit by throw and called out!

[irefky]

BR has their running lane, if he was running on the actual base line, correct call.

[rrussum]

Thank you so that I have it clear should I teach him to run in foul territory?

[LMan]

The B/R is generally permitted some leeway as he actually crosses 1B, since he must move to fair territory to touch (1B is in fair territory).

J/R sez:

It is not INT if:

(e) "his exit of the 45-foot lane is a step, stride, reach, or slide in the immediate vicinity of first base, with the sole purpose of touching the base (first base is partially outside the running lane).

Now the above is umpire judgement, naturally, as to if it applies to your situation.