A rhino at a zoo in Austria has attacked a married zookeeper couple, killing the woman and seriously injuring the man. Sabine Grebner, the director of the Hellbrunn zoo in Salzburg, told reporters on Tuesday that the 33-year-old woman had been assigned to put an insect deterrent on the rhino. It was then that the 30-year-old female rhino, Jeti, attacked the keeper, though it was not clear why, Austria’s APA news agency cited Grebner as saying. Salzburg police said that the woman, a German citizen from Bavaria, died of her injuries at the scene. The other zookeeper, a 34-year-old Austrian citizen, was also attacked and injured when he tried to chase the rhino away from his wife. The woman suffered severe chest trauma because of the attack and died in the enclosure while her husband had a fractured leg and was taken to the hospital, APA reported. The names of the two zookeepers were not given, in line with Austrian privacy rules. The zoo director said the fatally injured keeper was known to be “very careful and thoughtful with the animals, and she had an extremely good sense” when dealing with them. The exact circumstances of how the accident occurred had yet to be determined. “We don’t know what exactly happened,” Grebner said. “We are deeply upset and shocked.” All safety regulations would be re-evaluated, she said, adding that there had been no previous incidents at the rhino enclosure, which was set up nearly 30 years ago. The zoo remained closed on Tuesday.