NOGALES, Ariz. (AP) -- Homeland Security Secretary Jeh Johnson has made his first visit to the Arizona facility holding hundreds of mostly Central American children caught crossing the border illegally and says he will continue to discourage parents from sending their kids to the U.S.

Johnson toured the facility Wednesday with Arizona Gov. Jan Brewer, a staunch critic since the U.S. Border Patrol began sending the children to Arizona from Texas last month.

Young detainees shown here at the U.S. Customs and Border Protection Nogales Placement Center in Nogales, Ariz. (AP Photo/Ross D. Franklin, Pool)

Johnson says the kids have adequate care. He says he will continue to warn against crossing the border illegally and says there is "no free pass" to stay in the country.

Johnson has kept mum about how many children have been sent to Arizona, how many have been released and how many have reported back to immigration officials as required.