The U.S. Department of Justice said Sunday it will work with the Bureau of Prisons to examine what happened at a federal detention center in Brooklyn that had lost heat and electricity last week and to ensure that it has a backup system in place.

“In the coming days, the Department will work with the Bureau of Prisons to examine what happened and ensure the facility has the power, heat and backup systems in place to prevent the problem from re-occurring,” said Wyn Hornbuckle, deputy director of public affairs for the Justice Department.

Electrical power was finally restored at the Metropolitan Detention Center in Brooklyn at about 6:30 p.m. Sunday, Hornbuckle said.

Protesters have gathered outside the facility in recent days following news reports that those housed there have largely been without heat or power for the past week and also haven’t been able to communicate with lawyers or loved ones. Outdoor temperatures have been well below freezing on some recent days, though Sunday was warmer.

“With the heat and hot water operational, and the restoration of electrical power, the facility can now begin to return to regular operations,” Hornbuckle said.

When the lights came on at 6:20, the building erupted with a sound like estatic fireworks 💥✊💡 #UntilThereisHeat #MDCBrooklyn pic.twitter.com/VRy276nIpa

— Cassady Fendlay (@CassadyF) February 3, 2019

Earlier Sunday, some demonstrators attempted to enter the facility, and guards drove them back with pushes and shoves. Witnesses said they also used pepper spray. A reporter and photographer for The Associated Press were at the facility when a woman, whose son is being detained, tried to get into the jail.

On Sunday, an inmate was able to call through the window of his cell, which faces out to the street, to his mother below. The woman, Yvonne Murchison, was crying and upset and tried to get into the facility, where visits have been stopped.

“I’d trade places with him any day, that’s my child,” she said.

She was followed by activists and media into the lobby, where visitors have to pass through metal detectors.

Witnesses said officers used significant force to push the people out, with some of those attempting to come in being pushed to the ground. The AP photographer felt some type of spray, and began to have trouble breathing. Those affected were seen washing out their eyes with water or milk.

The Bureau of Prisons has acknowledged that the jail “experienced a partial power outage due to a fire in the switch gear room.” The bureau had said a new electrical panel was being installed by an outside contractor. The agency insisted that inmates had hot water for showers and sinks, and were getting medications as needed.

The jail administration did not return an email seeking comment on the clash Sunday.

New York Gov. Andrew Cuomo called for an investigation of the circumstances of the loss of heat and electricity by the federal Department of Justice, saying the situation was “a violation of human decency and dignity” and also raises “questions of potential violations of law.”

The Democrat said he wanted answers, and those responsible held accountable.

“Prisoners in New York are human beings,” Cuomo said. “Let’s treat them that way.”

The New York Civil Liberties Union released a statement Sunday calling on the Bureau of Prisons to “ensure that no detainee be subjected to retaliation for peacefully protesting.”

“Today’s confrontation between the Bureau of Prisons and family members of people jailed at MDC highlights the desperate need to address the dangerous, inhumane and unlawful conditions inside the facility,” NYCLU executive director Donna Lieberman said.

(AP)