Lawyers representing inmates of the Metropolitan Detention Center are suing the Federal Bureau of Prisons.

News 12 reported that power was restored Sunday at MDC in Brooklyn after inmates and workers had to face freezing temperatures inside the prison for days.

Protesters had rallied outside the facility, demanding that power be restored to the hundreds of inmates left in the dark by the outage.

Besorene Kingsley, the mother of an inmate there, called it a “human rights violation.”

“This is a constitutional rights violation and no one seems to be held accountable,” she told News 12.

In a Manhattan courthouse Tuesday, current staff of the facility and other witnesses testified about the conditions inside the federal jail. Many describing long-standing issues of no heat and hot water, even inadequate food supply. Others described no access to medication and mental health services.

While staff members said during the testimony that power and heating have been restored, people outside the facility in Sunset Park say it only tells part of the story. They say the facility still has a broken electrical system and crumbling infrastructure, with many cells freezing and even leaking.

The Federal Bureau of Prisons told News 12 that inmates have hot water for showers and basic necessities. They also say that staff reported that the heat is back on.