Mysterious Wonder

You throw the rock. It lands in the leaves, making a big enough sound that they all hear it. They turn to see what it is and you run at them full force, stabbing your sword into the head of the first as you grab the bow of the second, knock them over the head with it and shoot the third. All three fall limp, and with your sword you make sure they stay that way. You gasp in horror- the door has been broken down. Do you use the element of surprise and attack the traders when they emerge with the girl? Or is it too much of a risk in case they harm her inside?