Buses Bringing Illegals Here

Over 80 buses arrived in Piedras Negras Coahuila Mexico yesterday. They were placed in a holding area but there were several violent fights and many left, crossing the Rio Grande.  This information, was given to me today, by a lady who lives in Eagle Pass, TX.  How can they cross the Rio Grande, without permission?  Isn't there enough border guards, to control and prevent this?  I don't think so......now, trouble will really begin.  Looting, raping, robberies, you name it......