A federal judge on Friday ordered the immediate release of Rümeysa Öztürk, a Turkish Ph.D. student at Tufts University who had been held for six weeks in an immigration detention center, ruling that her arrest and continued confinement were unlawful and raised serious constitutional concerns.

A federal judge in Vermont ordered the release of Rümeysa Öztürk, a Tufts University doctoral student from Turkey, who was detained by federal immigration officers near her Massachusetts home on March 25.

A district court judge ordered the Tufts Ph.D. student to be released on bail after more than six weeks in detention for merely writing an op-ed in her student newspaper.