LOWER MANHATTAN, New York (WABC) -- On Thursday morning, advocates and elected officials plan to gather to demand the release of Mamadou Mouctar Diallo, a New York City public school student and Guinean-American asylum seeker who is in ICE custody.

Mamadou, who is from West Africa, was detained following a routine court appearance at Federal Plaza in Manhattan on August 4.

The 20-year-old Brooklyn Frontiers High School student is at least the third New York City public school student to be detained by ICE under the Trump administration's rigid immigration policies.

"I am heartbroken to share that another one of our students was detained by ICE, while attending his immigration hearing. Our Project Open Arms team is standing with the student's family, working closely to connect them with

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