Hundreds of people arrested crossing into U.S. illegally in matter of hours

More than 1,000 people trying to cross into the United States illegally were rounded up by Border Patrol agents in 24 hours in the Rio Grande Valley area.

In one mass arrest just after midnight, agents working near Granjeno, Texas, responded to a report of a large group of suspected illegal aliens walking towards the river levee.  As agents responded, they watched hundreds of people consisting of "family units" and unaccompanied children cross the river levee.

Agents took 289 people into custody and transported them to be processed.

The Border Patrol says that in the month of February, agents in the Rio Grande Valley Sector apprehended over 14,000 family units and more than 2,900 unaccompanied children.

The U.S. Customs and Border Protection agency has previously warned that there is a growing crisis at the Southwest border with a 300 percent increase in large family units apprehended in the region in the past year.

What the agency calls "Family Unit Aliens" has reached record numbers.  It says that family units and unaccompanied alien children make up 60 percent of apprehensions that have occurred along the southwest border.

The people in those groups are mostly from Guatemala, Honduras, and El Salvador.