Senate Democrats are requesting the Department of Homeland Security's top watchdog and the International Committee of the Red Cross (ICRC) probe detention facilities that house migrants near the southern border, after this week's death of an immigrant minor, the fifth since December.

John Kelly John Francis KellyMORE Two dozen Democrats sent a letter to, the acting inspector general at DHS, saying they were "deeply concerned" that conditions at facilities overseen by Customs and Border Protection (CBP) were placing migrants at risk.

"We respectfully request that you immediately investigate Department of Homeland Security (DHS) Customs and Border Protection (CBP) detention facilities at the southwest border, in particular the conditions for minors, family units, and other vulnerable individuals," the senators wrote in the letter, which was spearheaded by Sen.(D-Ill.).