Heh, heh, heh
Like I said before, the RG has to mass their forces before they can attack or repel our attack. Doing so means they're being tracked by JSTARS aircraft (which work even in a sandstorm).
In the infantry, we had a saying: "If you can see it, you can hit it. If you can hit it, you can kill it."
If that report is accurate, then they've been seen. The question is when to go in for the kill. Let them mass their forces, then go in for the kill. You can harass them along the way, but it can be better to let them get away from Baghdad so you can bring out the big guns like AC-130s, MOAB, A-10s, etc. Remember the "Highway of Death?" Time for part II.