CAPE TOWN, South Africa — A member of a South African research team that is confined for more than a year at an isolated Antarctica base was put under psychological evaluation there after he allegedly assaulted and sexually harassed colleagues, government officials said.

The problems at the SANAE IV base were first reported by South Africa’s Sunday Times newspaper, which said it had seen an email from a team member to authorities last month claiming the man had attacked the base leader and made threats.

The email pleaded for help.

“His behavior has escalated to a point that is deeply disturbing,” the email said, according to The Sunday Times. “I remain deeply concerned about my own safety, constantly wondering if I might become the next victim.” The report said the man allegedly made a death threat.

South Africa’s Ministry of Environment, which oversees the research missions, said in a statement Monday night that the alleged assault on the base leader was reported on Feb. 27, and officials and counselors intervened remotely “to mediate and restore relationships at the base.” They were speaking with team members almost daily, it said.

“The alleged perpetrator has willingly participated in further psychological evaluation, has shown remorse and is willingly cooperative,” the ministry said, adding that he had written a formal apology to the victim of the alleged assault. It said the allegations were being investigated. No one was identified.

The nine-member team, which includes scientists, a doctor and engineers, is expected to stay at the base for about 13 months until next year, authorities said, living in close quarters through the hostile Antarctic winter, whose six months of darkness begin in June.

The base is on a cliff in Queen Maud Land and is surrounded by a glacial ice sheet, more than 4,000 kilometers (2,485 miles) from South Africa.

The next planned visit by a supply ship is in December, according to the South African National Antarctic Program. It takes the ship around 10 days to travel from Cape Town.

Authorities said they had decided not to evacuate anyone from SANAE IV, where the onset of unpredictable weather conditions meant the team was now confined to the base.

The ministry said all team members had undergone evaluations ahead of the trip to ensure they are able to cope with the “extreme nature of the environment in Antarctica” and the isolation and confinement, and no problems were identified.

“It is not uncommon that once individuals arrive at the extremely remote areas where the scientific bases are located, an initial adjustment to the environment is required,” it said.

Previous problems have been reported at another of South Africa’s remote research bases on Marion Island, a South African territory near Antarctica.

In 2017, a member of a research team there smashed a colleague’s room with an ax over an apparent love triangle, according to a report to South Africa’s Parliament. Lawmakers said it appeared the researchers were living in highly stressful conditions.

The National Science Foundation, the federal agency that oversees the U.S. Antarctic Program, published a report in 2022 in which 59% of women in the U.S. program said they’d experienced harassment or assault while on research trips in Antarctica.

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