The US special envoy to Haiti resigned in protest in a letter that blasted the Biden administration for deporting hundreds of migrants back to the crisis-engulfed Caribbean nation from a camp on the US-Mexican border in recent days.

Daniel Foote, a career diplomat named to his post in July, said the "collapsed state" was unable to support the infusion of returning migrants.

"I will not be associated with the United States' inhumane, counterproductive decision to deport thousands of Haitian refugees and illegal immigrants," Foote said in a letter addressed to Secretary of State Antony Blinken that circulated publicly on Thursday.

Haiti, the poorest nation in the Western Hemisphere, has been hit in recent weeks by a presidential assassination, gang violence and a major earthquake.

-Reuters -