A U.S. congressional hearing on the immigration raids of Mississippi chicken plants will take place on Nov. 7 at Tougaloo College.

That's exactly three months after federal agents descended on seven chicken plants in central Mississippi, as part of the largest single-state immigration raid.

Hundreds of agents arrested 680 workers suspected of being in the country without permission, according to federal authorities.

Two days after the raids U.S. Rep. Bennie Thompson and other federal lawmakers sent a letter to the U.S. Attorney General and the U.S. Department of Homeland Security, requesting documents and announcing an investigation into the raids.

Thompson said in a press release Wednesday that major questions remain unanswered.

"We still don't have a proper explanation of why the federal government planned and executed these raids without accounting for the impact on children, families, and the community," Thompson said. "Because of this negligence, dozens of children went home after their first day of school to find that one or both of their parents were nowhere to be found."

The Committee on Homeland Security, which Thompson chairs, will hold a "public field hearing" at 10 a.m. in Holmes Hall Auditorium at Tougaloo College.

"It is imperative that Congress not ignore our oversight responsibilities as the Trump Administration continues to cruelly target migrant families," Thompson said. "This hearing will be an opportunity to hear directly from our communities on how the Administration’s immigration policies have impacted them."

A list of witnesses will be announced, the press release said.

More information and a live stream of the hearing will be posted on this website: homeland.house.gov/activities/hearings/immigration-raids-impacts-and-aftermath-on-mississippi-communities

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Update on the raids

Authorities said more than 300 people were released on humanitarian grounds within 27 hours of the raids.

Almost all of the people detained were central Americans — predominantly Guatemalans — according to an Immigration and Customs Enforcement spokesman.

The Clarion Ledger and the USA Today Network identified three detained women who were breastfeeding at the time of their arrest, according to family and attorneys.

Parents arrested and released in the raids have struggled to find work and others have quit their jobs to take of their children while waiting on their partner to be released form ICE detention, according to numerous interviews with community members, clergy and undocumented workers.

Dozens of those arrested have been charged with federal crimes, mostly related to illegal reentry into the country or illegally misusing documents, according to federal court records.

Unsealed search warrants filed by federal authorities suggest that managers and officials at the chicken plants were aware their employees were in the country without proper documentation.

One chicken plant owner, Chicago-based Koch Foods, has filed a lawsuit challenging the legality of the raids.

No charges have been brought against the four companies or their officials yet.

A recent poll found 68 percent of Mississippians want the chicken plant owners to face criminal prosecution.

Contact Giacomo "Jack" Bologna at 601-961-7282 or gbologna@gannett.com. Follow him on Twitter @gbolognaCL.