Thousands of African migrants held up in a southern Mexican city have formed an official organization, criticizing their treatment by immigration authorities and demanding passage into the United States.

The Assembly of African Migrants — a confederation of about 3,000 people from various African countries currently detained in Tapachula, Mexico — launched this week.

The group issued its first news release on Thursday, describing their origins, how they’ve suffered since entering Mexico, and their demands.

“We, the people of African origin, forced to remain Tapachula, suffer an unbearable humanitarian situation related to nurture, housing, health and hygiene; as well as systematic discrimination by immigration authorities,” their news release began. “Since we left our countries, for us life has been a permanent escape. We feel despair, hopelessness, fear, demoralization, loneliness and abandonment.”

The Assembly of African Migrants is made up of illegal immigrants who traveled from the Republic of the Congo, the Democratic Republic of the Congo, Angola, Cameroon and other African countries.

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They left their countries, travelled across South and Central America, but have remained detained in Tapachula, a city on Mexico’s southern border near Guatemala.

Thanks in large part to pressure from the Trump administration, the Mexican government has dramatically stepped up enforcement against illegal immigration.

While the majority of illegal migrants traveling through Mexico are Central Americans, thousands of African migrants have also found themselves stuck near Tapachula’s federal immigration office.

Faced with threats of tariffs from Washington, D.C., the Mexican government has placed thousands of newly-formed National Guard troops on its southern border with Guatemala, and have blocked caravans attempting to travel through its country. Mexico has also agreed to work with the Trump administration on Wait in Mexico and metering policies that keep illegal immigrants out of the U.S.

Besides blaming “Western powers” of fomenting the chaos that eventually forced them to flee, and accusing Mexican authorities of hostility and racism, they are demanding they be allowed to keep traveling north. Many of them are hoping to obtain transit passes that will allow them to reach the U.S. or Canada.

“Our situation is deplorable and violates our human rights,” the news release continued. “When we go out to the streets to demand solutions and rights, we suffer more repression by agents of the National Guard and Municipal Police, we are treated with violence while the competent authorities neither listen to us nor receive us.”

Clashes between illegal immigrants and Mexican authorities have reached an apex. Dramatic footage was released on Tuesday of Africans migrants fighting with law enforcement in Tapachula.

The clashes come as Mexico is witnessing a record number of migrants from Africa, complicating an already arduous repatriation process for those required to return home.

Four times as many undocumented Africans reached Mexico in 2018 compared to five years ago, according to data from the Mexican Office for Domestic Affairs.

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More recently, the number of illegal Africans tripled in the first four months of 2019 compared to the same period of time in 2018.

Most of them are attempting to reach the U.S., fleeing the instability of their home countries.

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