UPDATE: A witness told authorities a gate blocked by a ball at a North Carolina animal preserve allowed a lion to reach three people cleaning an enclosure and begin a fatal attack, biting one intern's ankle and pulling her into the enclosure, according to a medical examiner's report.

Lt. Eugene Riddick of the Caswell County Sheriff's Department advised that animal trainer Ashley Watts reported separating the 14-year-old lion named Matthai into a section of an enclosure at the Conservators Center in Burlington on Dec. 30, according to the report first reported on by WRAL-TV. But Watts said the gate that secures that section was blocked by a large ball and the lion entered the area that Watts, 22-year-old intern Alex Black and a second intern were cleaning and attacked Black, the report states. Watts tried to separate them, but before she could close the gate, Matthai bit Black's ankle and pulled her into the enclosure.

Riddick advised that fire department personnel used a firehose to separate the lion and Black without success, according to the report. The lion dragged Black around the enclosure by her neck "for an extended amount of time." After attempts to sedate the lion with darts failed, deputies shot the lion eight times, killing the animal and ensuring Black's body could be safely recovered, the report said.

The initial assessment showed Black died from multiple deep lacerations to the neck with significant blood loss, according to the report. It lists the probable cause of death as "Mauling by Animal."

In a statement provided to WFMY-TV, the center disputes reports that the gate was obstructed by a ball, saying that is "neither accurate nor plausible." However, the center does not explain how the lion was able to reach the three.

The attack occurred less than two weeks after Black, a recent college graduate from New Palestine, Indiana, had begun working at the nonprofit wildlife facility. The center, described recently as a "community zoo" by its executive director, was founded in 1999.

USDA inspections in 2017 and 2018 found no problems at the center, according to government reports. A government inspector counted 16 lions among 85 total animals in 2018.

The center stresses in its statement that as an intern, Black wasn't responsible for the accident and that "all credible evidence" indicates that she was "killed almost instantly" and first responders were "conducting a recovery not a rescue." The center reviewed safety policies and procedures and re-trained staff, and said it's confident that, when followed, those existing policies and procedures are sufficient.

Lt. Darrell McLean, a spokesman for the Caswell County Sheriff's Office, declined comment Wednesday.

PREVIOUS STORY: A zoo employee in North Carolina was killed Sunday after a lion escaped a locked space.

The Conservators Center in Burlington in Caswell County announced a worker was killed during a routine cleaning of an animal enclosure at about 11:30 a.m. ET.

"While a husbandry team led by a professionally trained animal keeper was carrying out a routine enclosure cleaning, one of the lions somehow left a locked space and entered the space the humans were in and quickly killed one person," the zoo said in a statement.

The lion was shot and killed, the center said.

It is unclear how the lion escaped its enclosure. The name of the victim has yet to be released.

The Conservators Center said it will be closed until further notice.

The nonprofit zoo is an educational nonprofit dedicated to providing a specialized home for select carnivore species, according to it website. It is home to more than 80 animals from and over 21 species and employs more than a dozen full and part-time workers.

Burlington is between Greensboro and Durham.