Mexico trying to funnel migrants across Rio Grande into Texas.

A camp where more than 14,000 migrants had waited along the Texas border just days ago was dramatically smaller at dawn Thursday, while across the river in Mexico, Haitian migrants in a growing camp awoke surrounded by security forces as a helicopter thundered overhead, the Associated Press reported.

Both governments appeared eager to end the increasingly politicized humanitarian situation at the border, even as the U.S. expulsion of Haitians to their troubled homeland caused blowback for the administration of President Joe Biden.

The Biden administration’s special envoy to Haiti, Daniel Foote, submitted a letter of resignation protesting the “inhumane” large-scale expulsions of Haitian migrants, U.S. officials said Thursday.

In Mexico, migrants who had camped in a park beside the river in Ciudad Acuña found state police trucks spaced every 30 feet or so between their tents and the water’s edge. Still, after anxious minutes of indecision, dozens of families opted to hustle into the river and cross at a point where there was only one municipal police vehicle, calculating it was better to take their chances with U.S. authorities.

The entrance to the park was blocked and just outside, National Guard troops and immigration agents waited along with three buses. A helicopter flew overhead.

The camp’s usual early morning hum was silenced as migrants tried to decide what to do.

Guileme Paterson, a 36-year-old from Haiti, appeared dazed. “It is a difficult moment,” she said before beginning to cross the Rio Grande with her husband and their four children.

The Mexican authorities’ operation appeared designed to drive the migrants back across the river into Texas. A fence line and the line of state police vehicles funneled the migrants back to the crossing point they had been using all week.

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