A U.S. Navy destroyer went days in the South China Sea without power last month, leaving sailors without potable water, galley services, toilets or air conditioning.

USS Benfold, an Arleigh Burke-class guided-missile destroyer, suffered an “engineering casualty” with its generators, causing a power outage for four days while conducting routine operations in the Indo-Pacific, 7th Fleet spokesperson Cmdr. Matthew Comer told Military Times.

Comer declined to comment about where exactly the incident occurred, but multiple news outlets reported it happened in the South China Sea.

The ship received support from the George Washington Carrier Strike Group, which included meals from Ticonderoga-class guided-missile cruiser USS Robert Smalls.

The engineering incident occurred July 24, forcing the destroyer to be towed by contracted tugboats into Subic Bay, Philippines, for repairs on July 28. The ship was met upon arrival by subject-matter experts from Ship Repair Facility-Japan Regional Maintenance Center, Comer said.

“There were no injuries to the crew, who demonstrated resilience, grit, professionalism, and unwavering steadiness in their response,” Comer said.

The day after arriving in the Philippines, the ship’s crew received food and contracted lodging off board. Benfold’s power was restored July 30, and all necessary repairs were completed prior to the ship berth shifting for fuel over a week later on Aug. 7.

All engineering, combat systems and crew support systems were functioning normally by the time the ship left Subic Bay on Aug. 8.

“The crew was directly supported by ships in the strike group while at sea and every effort was made to ensure the crew was supported on arrival in Subic Bay, Philippines,” Comer said.

The engineering mishap is under investigation, Comer said.

The incident follows reports of poor morale and mental health conditions on USS Abraham Lincoln, which has been deployed for nine months, part of which has been in support of U.S. military operations against Iran.

Recently, U.S. Central Command leader Adm. Brad Cooper visited the Nimitz-class aircraft carrier after Military Times learned that at least two sailors attempted to go overboard during the ship’s extended deployment.

Cooper said that service at sea can be challenging but asserted that the Lincoln has the lowest number of mental health cases among the Navy’s 11 active aircraft carriers.

U.S. lawmakers have begun pressing the service for information on the Lincoln’s conditions and to elaborate on the ship’s lengthened deployment schedule, asking for reports on the ship’s problems with basic supplies, water, plumbing, mental health, deck safety and mail.

But Pentagon and White House leaders have continued to dismiss concerns, with President Donald Trump saying the deployment’s length is “not nearly long enough.”