U.S. Army officials announced the death of four soldiers who were killed during a helicopter crash at Fort Hood Monday evening.

The deadly crash occurred while four soldiers were aboard their UH-60 Black Hawk helicopter during a routine training mission at the Fort Hood military post in Texas. According to a statement released by the Army's Fort Hood Press Center, the UH-60 chopper went down some time after 5:49 p.m. in the northeast portion of the Fort Hood Range, which is about 60 miles north of Austin.

Emergency search and rescue crews then found the wreckage and the dead crew members following an extensive search of the area.

Officials said the crew was assigned to Division West, First Army. However, their identities will not be released to the public until 24 hours after their families have been notified, said officials on Tuesday.

In the meantime, the cause of the crash has still not been determined, but Fort Hood officials said a panel would be assigned to investigate.

"They were on a routine training mission at the time," the Army base said, adding "The cause of the crash is unknown at this time." Other details have not been made available.

Fort Hood covers 214,000 acres in Killeen between Dallas and San Antonio, making it one of the Army's largest bases in the nation. It also contains over 135,000 acres that are reserved for training purposes, according to The Associated Press. Plus, it is home to a population of about 218,000 people that includes active-duty personnel, their family members and others.

In addition, it houses the 1st Cavalry Division and the West Division of the First Army as well as other units, including the Headquarters Command III Corps, 3rd Armored Cavalry Regiment and 3rd Air Support Operations Group, reports KTLA 5.