WASHINGTON — A Muslim Marine said he was called a terrorist and ordered into an industrial clothes dryer multiple times by a drill instructor who then turned it on, burning him, according to investigative documents that describe the abuse of recruits at the service’s training center at Parris Island, S.C.

‘‘You’re going to kill us all the first chance you get, aren’t you, terrorist?’’ the drill instructor thundered at the recruit, the new Marine later alleged, according to the documents that have not been released publicly but were reviewed by the Washington Post. ‘‘What are your plans? Aren’t you a terrorist?’’

The issue of hazing and abuse at Parris Island surfaced March 18, when a 20-year-old recruit with Pakistani roots — Raheel Siddiqui of Taylor, Mich. — died after leaping from a stairwell landing that was nearly 40 feet high while running away from the same drill instructor who used the dryer. The instructor had just slapped Siddiqui before he jumped. Siddiqui’s death drew public scrutiny to a culture of harsh punishments at Parris Island, one that Marine officials were already examining, the documents show.

Last week, service officials revealed that 20 members of Parris Island’s staff could face criminal charges or administrative discipline following the conclusion of three investigations into abuse allegations. But the documents and an interview with a Marine official with knowledge of the investigations suggest dozens more Parris Island Marines could be implicated in the scandal.

Marine Commandant General Robert Neller, addressing the abuse allegations last week, said in a statement that recruit training will remain physically and mentally challenging but that the manner in which Marines are made is as important as the final product.

‘‘When America’s men and women commit to becoming Marines, we make a promise to them,’’ he said. ‘‘We pledge to train them with firmness, fairness, dignity, and compassion.’’

Some details of the abuse have previously been reported, but the investigative documents describe an environment in which one unit in particular — Third Recruit Training Battalion — had drill instructors who abused them physically and emotionally.

Ethnic and gay slurs were also used regularly, and drill instructors ordered repeated, unauthorized physical training that sometimes injured recruits. The drill instructors also sometimes were drunk on the job, bringing Fireball whiskey into work on at least one occasion, recruits told investigators.

The drill instructor involved in the dryer case, an unidentified sergeant, was allowed to continue training recruits after allegations of abuse were made, in part because Marine officials did not take the accusations seriously, an investigation found.

The alleged incident occurred in 2015 and was reported by the targeted Marine and two enlisted colleagues. The new Marine said he was also accused of participating in the Sept. 11, 2001, attacks.

The allegations shocked drill instructors at the service’s only other enlisted training depot in San Diego. ‘‘Even back in the day when they were really brutal at Parris Island, I can’t imagine that happening. That’s abuse,’’ said a Marine instructor there who spoke on the condition of anonymity to discuss an ongoing investigation. “There was clearly a breakdown in leadership at Parris Island.’’