EMBED >More News Videos Two parents had a disagreement that ended with one pointing a gun at another this morning at the drop-off lane of Deer Park Elementary, according to the school principal.

DEER PARK, TX (KTRK) -- Two moms involved in a frightening school pick-up line incident in Deer Park may be back this morning.School officials are on high alert hoping there won't be a round two after one woman pulled a gun on another yesterday.The incident was witnessed not only by the two mom's children, but other parents, too.Neighbors said the two women began arguing while they were in the school drop off line.One mom may have been mad over how the other mom may have been driving in the school zone.That is when the two moms got into it, neighbors say, with one mom pulling out a gun and threatening the other woman.Their kids were in their cars the entire time. Fortunately, no one was injured and the gun was not fired, but it was still very scary, according to witnesses.Parents are obviously on alert again this morning.The school sent out this letter to parents Thursday: