BOSTON – With graduation looming, a time for celebration turned somber at Boston University on Saturday, as students who were packing up at the end of the school year learned that three classmates studying in New Zealand were killed when their minivan crashed during a weekend trip.

At least five other students were injured in the accident early Saturday, including one who was in critical condition.

Boston University spokesman Colin Riley said those killed in the accident were Daniela Lekhno, 20, of Manalapan, N.J.; Austin Brashears, 21, of Huntington Beach, Calif.; and Roch Jauberty, 21, whose parents live in Paris.

The students were traveling in a minivan about 7:30 a.m. Saturday near the North Island vacation town of Taupo when the vehicle drifted to the side of the road and then rolled when the driver tried to correct course, New Zealand police said.

Three of the students died at the scene, police said. Another woman was in critical condition at an area hospital, while at least four other students suffered moderate injuries.

Another BU student, Margaret Theriault, was airlifted from the crash site to a hospital in Taupo and was in critical condition, the university said.