BOSTON — Seeing his injured Boston University classmates lying in a New Zealand roadway after their minivan rolled over, Evan White said he felt helpless.
"Our first impulse was to do whatever we could, but everyone had a sense of helplessness," Mr. White, a junior riding in one of three minivans carrying the students on a hiking trip, told the school's website. "I helped people away from the van. Others ran to a house to get help."
The Saturday morning crash killed three students and injured five others, one critically.
Meg Theriault, 21, was in intensive care Monday at a New Zealand hospital. She suffered a serious head injury, a broken right arm and grazes over her body, her parents said in a statement.
"She is a fit and stubborn young woman, and we know she is getting the best care," said Todd and Deb Theriault of Boston, who traveled to New Zealand to be with their daughter.
The school said 26 students were traveling in the three vans on their way to walk the Tongariro Crossing, a hike across a volcanic crater that is rated as one of New Zealand's most spectacular.
One of the minivans drifted to the side of the road and then rolled when the driver tried to correct course near the North Island vacation town of Taupo, New Zealand police said.
The driver of the van Mr. White was in saw the crash in his mirror, pulled over and backed up to the crash site, the school said. The driver of the third didn't see the accident and continued to the destination.
New Zealand police official Kevin Taylor said it was unclear why the van drifted to the side of the road. He said some of the students were thrown from the vehicle, indicating they may not have been wearing seat belts.
An investigation into the cause of the accident is going to take several more days, he said Monday.
Killed in the accident were Austin Brashears, of Huntington Beach, Calif.; Daniela Lekhno, of Manalapan, N.J.; and Roch Jauberty, of Paris.
"These things can happen when you've got international tourists on your roads, but obviously, it's a great tragedy, and our sympathies go out to the families," New Zealand Prime Minister John Key said Monday on Television New Zealand's morning show.
Miss Theriault was airlifted to Waikato Hospital and had surgery there Saturday, according to hospital spokeswoman Mary Anne Gill. She said two other women, one 20 and the other 21, remained hospitalized Monday in stable condition.
The other two injured - a 20-year-old man and 20-year-old woman - were released Saturday.
All the students except Miss Theriault were enrolled in a BU study-abroad program in Auckland, the university said. Miss Theriault was enrolled in a study abroad program in Sydney.
Study-abroad program executive director Bernd Widdig called the students' deaths an "unprecedented tragedy," the worst to hit the program since it began in the 1980s. The New Zealand part of the program began in 2003 and involves courses at the University of Auckland and Auckland University of Technology.
Mr. White was quoted on BU's website as saying that the students in New Zealand were staying together in Auckland after the accident.
"Last night, we all dragged our mattresses into the common room and slept in the same place just to show solidarity," he said. "We are just talking about it and trying to be very open. Hopefully, everyone at BU can come to terms with it, too, like we're trying to do here."
The school held a vigil Saturday night. Tori Pinheiro, a close friend of Mr. Brashears, told the few hundred who gathered that she had found an old voicemail he had left her.
"I listened to it four times, just to hear your voice," she told the crowd as she tried to fight back tears.