U.S. authorities are on high alert along the southern border amid concern that ISIS may try to attack from the Mexican side. One Texas sheriff has said that he received an intelligence report stating that ISIS cells are operating in Ciudad Juarez, which is just across the border from El Paso, Texas.

Midland County Sheriff Gary Painter talked to Elisabeth Hasselbeck to discuss the actions he's taking amid the growing threat. Painter said he's been told that local authorities need to be on alert and be looking out for ISIS fighters trying to cross the border.

"The border is wide open. ... There's always a way to get across," said Painter, pointing to evidence along border trails that Muslim individuals have been in the area.

"We have have found Muslim clothing. They have found Koran books that are laying on the side of the trail. So we know that there are Muslims that have come across and are being smuggled into the United States," he said.

Elisabeth asked Painter for his message to ISIS.

"If they show their ugly head in their area, we'll send them to hell," said Painter, calling for an intense bombing campaign against ISIS in Iraq and Syria.

"I would like for 'em to hit 'em so hard and so often that every time they hear a propeller on a plane or a jet aircraft engine that they urinate down both legs. When you do that, then you've accomplished a lot."

Watch the full interview above.